13x • 4x^2y

Does it equal 52x^2y? Or can you not combine them?

Answers

Answer 1

We can simplify the expressiοn tο  [tex]52x^3y,[/tex] nοt [tex]52x^2y[/tex].

In math, hοw dο yοu sοlve expressiοns?

Yοu must substitute a number fοr each variable and perfοrm arithmetic οperatiοns tο evaluate an algebraic expressiοn. Because 6 + 6 = 12, the variable x in the preceding example is equal tο 6. We can evaluate the expressiοn after replacing the variables with their values if we knοw their values.

We can use expοnent prοperties tο simplify the expressiοn [tex]13x[/tex]• [tex]4x^2y[/tex]:

[tex]13x[/tex]•[tex]4x^2y = 13[/tex] • [tex]x^1[/tex]• 4 • [tex]x^2[/tex]•[tex]y^1[/tex]

[tex]= 52[/tex]• [tex]x^3[/tex]•[tex]y^1[/tex]

As a result, we can simplify the expressiοn tο [tex]52x^3y[/tex] rather than[tex]52x^2y.[/tex]

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Related Questions

A car moves from rest.
The graph gives information about the speed, v metres per second, of the car t seconds after it starts to move.
Work out an estimate for the distance the car travels in the first 40 seconds of its journey. Use 4 strips of equal width.

Answers

Add up the areas of all four strips to get an estimate for the distance traveled by the car in the first 40 seconds: Distance traveled = Area of strip 1 + Area of strip 2 + Area of strip 3 + Area of strip 4.

What is area?

In geometry, area is the measure of the size or extent of a two-dimensional surface or region. It is typically measured in square units, such as square meters or square feet. The area of a shape can be calculated by multiplying its length by its width or by using specific formulas for different shapes, such as the area of a rectangle, circle, or triangle. Area is an important concept in many fields, including mathematics, physics, engineering, and architecture.

by the question.

Assuming the graph shows the speed of the car in meters per second (m/s) on the y-axis and time in seconds on the x-axis, we can estimate the distance traveled by the car in the first 40 seconds by dividing the area under the graph for that time period into four equal strips and calculating the area of each strip using the trapezium rule.

To do this, we need to find the speed of the car at four different times during the first 40 seconds, which we can do by reading off the graph. Let's say we choose the times t = 0, 10, 20, and 30 seconds.

Then we can estimate the distance traveled by the car in the first 40 seconds as follows:

Calculate the area of the first strip (from t = 0 to t = 10 seconds) using the trapezium rule:

Area of strip 1 = (1/2) x (speed at t = 0 seconds + speed at t = 10 seconds) x 10 seconds

Repeat for the other three strips, using the appropriate speeds and time intervals:

Area of strip 2 = (1/2) x (speed at t = 10 seconds + speed at t = 20 seconds) x 10 seconds

Area of strip 3 = (1/2) x (speed at t = 20 seconds + speed at t = 30 seconds) x 10 seconds

Area of strip 4 = (1/2) x (speed at t = 30 seconds + speed at t = 40 seconds) x 10 seconds

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A graduated cylinder that is 24 cm tall can hold 1 L of water.

What is the radius of the cylinder? (round to the nearest hundredth)

Answers

Step-by-step explanation:

24×1000000000000000000000000000000000000

a) Work out the value that completes the equation for the line on the graph. b) If Keira has burned 640 calories cycling, how many miles has she cycled? Give any decimal answers to 2 d.p. x distance cycled Number of calories burned against distance cycled calories burned Calories burned 400 350 300- 250 200 150 100 50 0 2 4 6 8 10 12 14 16 Distance cycled (miles)​

Answers

The value that completes the equation for the line on the graph is -200. Keira has cycled 44.8 miles if she has burned 640 calories.

What is slope?

It describes how much the dependent variable (y) changes for a given change in the independent variable (x).

According to question:

a) To work out the value that completes the equation for the line on the graph, we need to find the equation of the line that passes through two points on the graph. Let's choose two points on the line, for example, (8, 250) and (16, 400).

In this case, the change in y is 400 - 250 = 150, and the change in x is 16 - 8 = 8. Therefore, the slope is:

slope = 150 / 8 = 18.75

y - y1 = m(x - x1)

Let's use the point (16, 400):

y - 400 = 18.75(x - 16)

Simplifying this equation, we get:

y = 18.75x - 200

Therefore, the value that completes the equation for the line on the graph is -200.

b) To find the distance cycled if Keira has burned 640 calories, we need to use the equation of the line we found in part (a). We can set y (calories burned) equal to 640 and solve for x (distance cycled):

640 = 18.75x - 200

840 = 18.75x

x = 44.8 (rounded to 2 decimal places)

Therefore, Keira has cycled 44.8 miles (to 2 decimal places) if she has burned 640 calories.

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Please help it is due tomorrow

Answers

Answer: 30

Step-by-step explanation: So what you do is,

1) Add the 25 to the 8

2) Find the sum

3) Subtract 3 from the sum

4) Done!

I hope this helps!

Best,

Abigail H

8th Grade

1) Add the 25 to the 8
2) Find the sum
3) Subtract 3 from the sum
4) Done!
I hope this helps!
Best,

What is the value of tan(A) in the diagram?

a. 12/5
b. 5/12
c. 12/13
d. 5/13

Answers

tan(A) = 12/5
tangent = opposite/adjacent
opposite of angle A = 36
adjacent of angle A = 15
tan(A) = 36/15
simplify: tan(A) = 12/5

Use the following function to find d(0)
d(x)=-x+-3
d(0)=

Answers

When the function d(x) = -x +(-3), then the value of d(0) is -3

In mathematics, a function is a relationship between two sets of numbers, called the domain and range. A function assigns each element of the domain to exactly one element of the range.

In the given problem, we are given a function d(x)=-x-3. The notation d(0) represents the value of the function d(x) when x = 0.

To find d(0), we need to substitute x = 0 in the function d(x)=-x-3, which gives:

d(0) = -(0) - 3

The first term -(0) is equal to zero, and the second term -3 is a constant value that remains the same regardless of the value of x. Therefore, we can simplify the expression as

d(0) = -3

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A forester reported the following distribution of tree types to a local logging company. Tree Type Spruce Pine Fir Deciduous Other Percent 52% 22% 8% 10% 8% The logging company generated a random sample of 100 trees and observed the following distribution of trees in each of the categories. Tree Type Spruce Pine Fir Deciduous Other Observed Count 51 21 10 9 9 The logging company would like to use its sample to provide convincing statistical evidence that over 50 percent of the trees in the forest are spruce trees. The logging company has decided to use a chi-square goodness-of-fit test to justify its claim. Why is the chi-square goodness-of-fit test not an appropriate procedure for the logging company to use?

Answers

The chi-square goodness-of-fit test is not an appropriate procedure for the logging company to use. It is because chi-square distribution checks for overall population distribution and not an individual category.

A chi-square goodness-of-fit test would be used to show that the entire distribution of trees in the forest is different than what the forester reported, not necessarily the individual proportion representing the spruce trees.

A statistical hypothesis test called the Chi-square goodness of fit test is used to examine whether a variable is likely to come from a certain distribution or not. It is frequently used to determine if sample data is representative of the entire population. When we have counts of values for a categorical variable, we can utilise the test. This test is equivalent to the Chi-square test of Pearson. It can be used to determine whether our expectations and the observed distribution of a categorical variable differ.

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find the smallest positive integer $n$ so that \[\renewcommand{\arraystretch}{1.5} \begin{pmatrix} -\frac{\sqrt{2}}{2}

Answers

The smallest positive integer n so that,

$$\renewcommand{\arraystretch}{1.5} \begin{pmatrix} -\frac{\sqrt{2}}{2} \frac{1}{n} \\ \frac{\sqrt{2}}{2} \frac{1}{n} \end{pmatrix}$$is a column matrix that contains integers,

we can write it as follows. $$\begin{pmatrix} -\frac{\sqrt{2}}{2} \frac{1}{n} \\ \frac{\sqrt{2}}{2} \frac{1}{n} \end{pmatrix} = \begin{pmatrix} -\frac{1}{\sqrt{2}} \\ \frac{1}{\sqrt{2}} \end{pmatrix} \frac{1}{n}.$$Since n has to be an integer, we have to find the smallest positive integer n for which the right-hand side is a column matrix containing integers. Since the left-hand side has a factor of 1/n, we can see that the smallest value of n must be a divisor of the denominator of the left-hand side. The denominator of the left-hand side is $\sqrt{2}/2$. If we multiply this by 100, we get 70.710678.

Therefore, the smallest positive integer n that satisfies the equation is the smallest divisor of 70.710678. This is 2, and it gives us the column matrix $$\begin{pmatrix} -\frac{1}{\sqrt{2}} \\ \frac{1}{\sqrt{2}} \end{pmatrix}.$$Therefore, the smallest positive integer n is 2.

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A and B are independent.
If P(A) = 1/2 and P(An B) = 6/15

Answers

This is true because you use A and B in an equation to get an answer.

There are 370 fish in the school pond, and 296 are goldfish. What percent of the fish are goldfish? help pls

Answers

Answer:

80% of the fish in the school pond are goldfish.

Step-by-step explanation:

To find the percentage of goldfish in the pond, we need to divide the number of goldfish by the total number of fish and multiply by 100.

percent of goldfish = (number of goldfish / total number of fish) x 100%

So, in this case:

percent of goldfish = (296 / 370) x 100%

percent of goldfish = 0.8 x 100%

percent of goldfish = 80%

Can someone please help me out with these two problems. I’ll award brainliest!! Thank you very very much

Answers

Answer:

QUESTION 24

To estimate the intercepts, we set f(x) to zero and solve for x:

f(x) = x^3 + 2x^2 - 5x - 6 = 0

Using synthetic division, we can find that x = -2 is a zero of the function. This means that (x + 2) is a factor of f(x), and we can write:

f(x) = (x + 2)(x^2 + x - 3)

Setting each factor to zero, we find that the intercepts are:

x + 2 = 0 -> x = -2

x^2 + x - 3 = 0 -> x = (-1 ± √13)/2

To estimate the turning points, we can use the fact that the derivative of a function is zero at a turning point. The derivative of f(x) is:

f'(x) = 3x^2 + 4x - 5

Setting f'(x) to zero, we find:

3x^2 + 4x - 5 = 0 -> x = (-2 ± √19)/3

We can now use these values to sketch the graph:

The intercepts are (-2,0) and approximately (-2.3,0.0) and (0.8,-7.5).

The turning points are approximately (-1.8,-11.1) and (0.5,-6.8).

The graph starts in the third quadrant, goes through the origin in the second quadrant, has a local maximum in the first quadrant, goes through the x-axis in the fourth quadrant, has a local minimum in the third quadrant, and goes to infinity in the second and fourth quadrants.

QUESTION 26

Here is a sketch of the graph of the polynomial function y = f(x) based on the given information:

            |                     /

            |                   /

            |                 /

            |               /

            |             /

            |           /

            |         /

            |       /

-----------+---------------

            |    /

            |  /

            |/

The graph has two x-intercepts, one around x = -3 and one around x = 2. There is also a turning point or local maximum around x = -1 and a turning point or local minimum around x = 1. The end behavior of the graph is that it approaches negative infinity as x approaches negative infinity and approaches positive infinity as x approaches positive infinity.

Answer:

To estimate the intercepts and turning points of the function f(x) = x^3 + 2x^2 - 5x - 6, we can use a table of values.

When x = 0, f(x) = -6. So the y-intercept is (0, -6).

Factoring the polynomial, we find that the zeros are x = -3, x = -1, and x = 2. Therefore, the x-intercepts are (-3, 0), (-1, 0), and (2, 0).

To find the turning points, we can look for where the slope changes sign. We can estimate that there is a local minimum at (-2.5, -13.6) and a local maximum at (1.1, -7.3).

Using this information, we can sketch the graph of f(x).

To sketch the graph of y = f(x) with the given information, we can plot the x-intercepts (-3, 0), (-1, 0), and (2, 0). We know that the function is positive on the intervals (-∞, -3), (-2, 0), and (2, 3), so we can sketch the function above the x-axis in these regions. Similarly, we know that the function is negative on the intervals (-3,-2), (0, 2), and (3,∞), so we can sketch the function below the x-axis in these regions.

We also know that the function is increasing on the intervals (-2.67, -1) and (1, 2.5), and decreasing on the intervals (-∞, -2.67), (1, 1) and (2.5,∞). Using this information, we can sketch the function as increasing in the intervals (-2.67, -1) and (1, 2.5), and decreasing in the intervals (-∞, -2.67), (1, 1), and (2.5, ∞).

Finally, we can connect the intercepts and turning points with smooth curves to obtain a sketch of the function y = f(x).

Loving the LED's btw!

a company purchased a new computer system for $28,000. one year later, the resale value of the system was $15,700. assume that the value of the computer system declines according to an exponential model. At what rate was the value of the computer system changing 4 years after it was purchased?
A. Declining at the rate of $2,767.74 per year.
B. Declining at the rate of $1,601.26 per year.
C. Declining at the rate of $3,6214.88 per year.
D. Declining at the rate of $8,803.21 per year.
E. Declining at the rate of $2,546.52 per year.
F. None of the above.

Answers

The rate at which the value of the computer system is changing 4 years after it was purchased is "Declining at the rate of $8,803.21 per year". The correct option is D.

We can use the exponential decay formula [tex]V(t) = V0 * e^{-kt}[/tex], where V(t) is the value of the computer system after t years, V0 is the initial value, and k is the decay rate.

We know that V(1) = $15,700 and V(0) = $28,000, so we can solve for k:

[tex]$15,700 = $28,000 * e^{-k*1}[/tex]

[tex]e^{-k} = 0.5607[/tex]

-k = ln(0.5607) ≈ -0.5797

k ≈ 0.5797

Therefore, the decay rate is approximately 0.5797 per year.

To find the rate of change of the value of the computer system 4 years after it was purchased, we can take the derivative of V(t) with respect to t:

dV/dt = -k * V0 * [tex]e^{-kt}[/tex]

Substituting t = 4, V0 = $28,000, and k ≈ 0.5797, we get:

dV/dt = -0.5797 * $28,000 * [tex]e^{-0.5797*4}[/tex] ≈ -$8,803.21 per year

Therefore, the value of the computer system is declining at the rate of approximately $8,803.21 per year 4 years after it was purchased.

The correct answer is (D) Declining at the rate of $8,803.21 per year.

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Tamika was out at a restaurant for dinner when the bill came. She wanted to leave a tip of 29%. What number should she multiply the cost of the meal by to find the total plus tip in one step?

Answers

The number Tamika should multiply the cost of the meal by to find the total plus tip in one step is 1.29.

Let x be the cost of meal.

Let m be the number she should multiply the cost of the meal by to find the total plus tip in one step.

Then Total amount Tamika pays(including tip) = mx.

We need to determine the value of m.

Given Tamika wanted to leave a tip of 29% of the bill amount.

Then the amount of tip [tex]= (\frac{29}{100} )x = 0.29x[/tex]

Thus, Total amount Tamika pays(including tip) = x + 0.29x = 1.29.

We found Total amount Tamika pays(including tip) = mx.

Comparing we have m = 1.29.

A bill amount is the total cost of goods or services purchased or availed of by an individual or organization. It represents the amount that the customer owes to the provider of the goods or services. A bill may include various components such as the price of the goods or services, taxes, fees, and other charges that may be applicable.

When a customer receives a bill, they typically have a certain amount of time to pay it in full. Failure to pay the bill on time may result in additional fees, penalties, or even legal action. It is important for customers to carefully review their bills to ensure that they are accurate and that they understand all of the charges included.

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why does a square root have a plus or minus sign attached to it.​

Answers

Answer:

To indicate that we want both the positive and the negative square root of a radicand

Answer:

Because a negative number times a negative number has a positive answer

Step-by-step explanation:

Use the figure shown.

Trapezoid M N P Q is divided into 4 triangles by N Q and M P, which intersect at point R inside the trapezoid. N P is parallel to M Q and M N is congruent to Q P.

If m∠MNP = 107, what is m∠NMQ?

m∠NMQ =

Answers

In the Quadrilateral MNPQ, if MP = 5.9, then RN = 1.8.

What is a trapezοid?

An οpen, flat οbject with fοur straight sides and οne set οf parallel sides is referred tο as a trapezοid οr trapezium. A trapezium's nοn-parallel sides are referred tο as the legs, while its parallel sides are referred tο as the bases.

Given:

Quadrilateral MNPQ is shοwn.

Trapezοid MNPQ is divided intο 4 triangles by NQ and MP.

MQ is parallel tο NP.

That means, MQ and NP always at the equal distance.

MN ≅ QP

Sο,

MP = QN

Nοw,

QN = QR + RN and QR = 4.1:

MP = QN

5.9 = 4.1 + RN

Then RN = 5.9 - 4.1 = 1.8

Therefοre, the value οf RN is 1.8.

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Complete question:

Quadrilateral MNPQ is shown.

Trapezoid M N P Q is divided into 4 triangles by N Q and M P, which intersect at point R inside the trapezoid. N P is parallel to M Q and M N is congruent to Q P. Angle N M P is 30 degrees and angle P M Q is 32 degrees. Segment Q R equals 4.1.

If MP = 5.9, what is RN?

(Round your answer to the nearest tenth. Write NA if there is not enough information given.)

If you choose to invest in a weighted blanket to ease anxiety and facilitate sleep you should choose one that weighs _____ percent of your body weight.

Answers

If you choose to invest in a weighted blanket to ease anxiety and facilitate sleep, you should choose one that weighs around 10 percent of your body weight.

Weighted blankets are designed to provide a calming and soothing effect on the body, which helps to reduce anxiety and improve sleep quality. The general rule of thumb for selecting the right weight for your blanket is to choose one that is around 10% of your body weight.

For instance, if you weigh 150 pounds, then a 15-pound weighted blanket would be appropriate. However, this is not a hard and fast rule, and individual preferences may vary. It's always best to consult with your doctor or therapist before investing in a weighted blanket to ensure it's a safe and effective option for you.

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Rotate the arrowhead 90 degrees anticlockwise around (0,0)

Answers

The new position of arrowhead graph ABCD is A'B'C'D' as shown in the below graph.

Define the term graph rotation?

Graph rotation refers to the process of rotating a graph, which involves changing the orientation of the edges or nodes in the graph while preserving the relationships between them.

From the given arrowhead graph as below; the points labelled are

A (-2, 2), B (0, 5), C (2, 2) and D (0, 3)

On rotating the graph through 90° anticlockwise around the origin (0, 0), the new positions of the points are:

A (-2, 2)  ⇒  A' (-2, -2)

B (0, 5)   ⇒  B' (-5, 0)

C (2, 2)   ⇒  C' (-2, 2)

D (0, 3)   ⇒  D' (-3, 0)

Therefore, the new position of arrowhead graph ABCD is A'B'C'D' as shown in the below graph.

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Label the trapezoids with the given side measures:,, and Use the similar figures and the given side lengths to complete the following prompts. Enter numerical answers only. If necessary, enter decimal numbers rounded to the nearest tenth of a number. Do not enter your answer as a fraction number

Answers

1) The length of DA = 4.5 units

2) The length of CB = 8 units

3) The length of XY = 12 units

Since trapezoids ABCD and WXYZ are similar to each other, their corresponding sides are proportional.

1) Since trapezoids ABCD and WXYZ are similar, their corresponding sides AD and WZ are parallel, and their bases AB and WX are parallel. Therefore, we can use the ratios of the corresponding sides to find DA:

DA/XY = AB/WX

DA/9 = 6/12

DA = (9/12) × 6

DA = 4.5 units

2) Similarly, we can use the ratios of the corresponding sides to find CB:

CB/ZY = AB/WX

CB/12 = 6/9

CB = (12/9) × 6

CB = 8 units

3) We can use the ratios of the corresponding sides to find XY:

AB/WX = DC/ZY

6/12 = DC/XY

DC = (6/12) × XY

DC = 0.5XY

Since ABCD is an isosceles trapezoid, DC = AB = 6. Therefore,

0.5XY = 6

XY = 12 units

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The given question is incomplete, the complete question is:

Isosceles trapezoids ABCD and WXYZ are similar to each other. Label the trapezoids with the given side measures AB=6, WX=12, and, ZW=9

Use similar figures and the given side lengths to complete the following prompts. Enter numerical answers only. If necessary, enter decimal numbers rounded to the nearest tenth of a number. Do not enter your answer as a fraction number.

1. DA =

2.CB =

3.XY =

I am stuck on this question..

Answers

The output of the definite integral and summation expression can be presented as follows;

[tex](\frac{\int\limits^1_0 {(\sum\limits_{n=5}^5 n\cdot 5 \cdot \sqrt{25} )} \, dx }{\int\limits^1_0 {(\sum\limits_{n=2}^5 2 + 6)} \, dx } ) = \frac{125}{32} =3\frac{29}{32}[/tex]

What is the difference between definite and indefinite integral?

An indefinite integral is an antiderivative of a function, while a definite integral is the limit of a sum of areas of rectangles.

The steps to integrate the specified definite integral expression can be presented as follows;

The integrals and the summations in the question are simplified thus;

Sum n = 5 to 5 n × 5 × √(25) is the sum of n times 5 times √(25) over the range [5, 5], which is the same as 5 × 5 × √(25) = 125

Sum n = 2 to 5, 2 + 6 is the sum of (2 + 6) over the range [2, 5], which, based on the operation is (2 + 6) + (2 + 6) + (2 + 6) + (2 + 6) = 32

The integration of the above summations are found as follows;

Integrate 125 dx from 0 to 1 is the definite integral of the constant function, 125, over the interval [0, 1], which is the same as 125 × (1 - 0) = 125.

The integration of 32 dx from 0 to 1 is the definite integral of the constant function 32 over the interval [0, 1], which is just 32 × (1 - 0) = 32

Plugging in the above values into the original expression, we get;

[tex]\frac{\int\limits^1_0 ({\sum\limits_{n=5}^5}n\cdot 5\cdot \sqrt{25} ) \, dx }{\int\limits^1_0 (\sum\limits_{n=2}^5 2+6) \, dx } = \frac{125}{32}[/tex]

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look at the picture for the question

Answers

0.64 is the probability that a student chosen at random is in the choir or the band or both.

What does a probability simple definition entail?

A probability is a number that expresses the possibility or likelihood that a specific event will take place. Probabilities can be stated as proportions with a range of 0 to 1, or as percentages with a range of 0% to 100%.

  60 are in choir and band, which leaves 50 (110 - 60) in choir and not band, and 180 (240 - 60) in band and not choir, and the remaining 220 (40 - 50 - 180) students don't belong to either. So

    P( choir or band ) = P(choir) + P(band ) - P( choir and band )

                      = 50/450 + 182/450 - 60/450 = 170/450

                      ≈ 0.38

If instead "110 of them are in choir" means 110 students are in choir and NOT in band, and "240 of them are in bad" means 240 students are in band and NOT choir, then

    P( choir or band ) = 110/450 + 240/450 - 60/450

                                  = 0.64

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suppose the probability of a painter selling his art at his first art show is 16.26% . if he painted 26 pieces of art, what is the probability that he sells more than 2 of them? round your answer to four decimal places.

Answers

The probability that the painter sells more than 2 pieces of art is 0.8251.

What is the probability?

The probability of the painter selling his art is P(S) = 16.26/100 = 0.1626

Since the painter painted 26 pieces of art, the number of trials, n = 26.

Let X be the random variable representing the number of pieces the painter sells. We need to find the probability that he sells more than 2 of them.

P(X > 2) = P(X = 3) + P(X = 4) + ... + P(X = 26)

Using the binomial probability formula, we have

P(X = x) = ⁿCₓ × pˣ × q⁽ⁿ⁻ˣ⁾

where ⁿCₓ = n!/x!(n - x)!

p = probability of success

q = probability of failure = 1 - p

We can substitute n, p, and q to find P(X = x) for each x, and then add them up.

[tex]P(X > 2) = P(X = 3) + P(X = 4) + ... + P(X = 26)\\P(X > 2) = 1 - P(X = 0) - P(X = 1) - P(X = 2)\\P(X > 2) = 1 - P(X < 2)\\P(X \leq 2) = P(X = 0) + P(X = 1) + P(X = 2)\\P(X \leq 2) = 0.0047104 + 0.0379791 + 0.1321676\\P(X \leq 2) = 0.1748571\\P(X > 2) = 1 - 0.1748571\\P(X > 2) = 0.8251429[/tex]

Rounding this to four decimal places, we get: P(X > 2) ≈ 0.8251. Therefore, the probability that the painter sells more than 2 pieces of art is 0.8251.

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Please help I’m very confused!!

Answers

Answer:

x=-2.5

Step-by-step explanation:

3 4(2.5-5) = (1/27) 2(-2.5+10)

I hohonestly don't know how to explain it

2x+2y= 24

x=3y

What is the value of x+y? I WILL MARK BRAINLIEST AND GIVE 20 POINTS

Answers

Answer:

x + y = 12

Step-by-step explanation:

Pre-Solving

We are given the following system of equations:

2x + 2y =24

x = 3y

We want to find the value of x + y.

Solving

We first need to find the values of x and y, which we will do by solving the system.

We can solve this system by substitution.

We know that x = 3y, so we can substitute 3y as x in 2x+2y=24.

This gives us:

2(3y) + 2y = 24

Multiply.

6y + 2y = 24

Add the terms together.

8y = 24

Divide both sides by 8.

y = 3

We found the y value, now let's find the value of x.

The second equation is x=3y, so if we plug the value of y in there, we can find the value of x.

Substitute 3 as y.

x = 3(3) = 9

The value of x is 9.

So, to find x+y, we substitute the values we found.

x + y = 3 + 9 = 12

if you spin the spinner 11 times, what is the best prediction possible for the number of times it will land on blue?

Answers

If the spinner is fair and has an equal chance of landing on each color, then the best prediction possible for the number of times it will land on blue when spun 11 times is 2.

If the spinner is fair, then the probability of it landing on each color is equal. Since the spinner has four colors, the probability of it landing on blue is 1/4 or 0.25.

To determine the best prediction possible for the number of times it will land on blue, we can multiply the probability of it landing on blue (0.25) by the total number of spins (11):

0.25 x 11 = 2.75

However, since we cannot have a fractional number of spins, we must round to the nearest whole number. Since 2.75 is closer to 3 than to 2, we might initially think that the best prediction for the number of times it will land on blue is 3. However, since we are looking for the best prediction possible, we need to consider the probabilities of landing on other colors as well. If we predict that the spinner will land on blue 3 times, then we are predicting that it will land on each of the other colors 2 times. This means that our total prediction is:

Blue: 3

Red: 2

Green: 2

Yellow: 2

However, this prediction is not the best possible prediction because it is not possible to have the spinner land on each of the other colors exactly 2 times. This means that we need to adjust our prediction to get as close as possible to landing on each color 2 times. The best prediction possible is:

              Blue: 2

              Red: 3

              Green: 3

              Yellow: 3

This prediction is the best possible because it gets as close as possible to landing on each color 2 times while still being a whole number. Therefore, the best prediction possible for the number of times the spinner will land on blue when spun 11 times is 2.

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Here is the region of integration of the integral ∫6 to- 6 ∫36 to x^2 ∫36-y to 0 dz dy dx. Rewrite the integral as an equivalent integral in the following orders a. dy dz dx b. dy dx dz c. dx dy dz d. dx dz dy e. dz dx dy

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The given integral is ∫6 to- 6 ∫36 to x^2 ∫36-y to 0 E)dz dX dy.

This integral can be rewritten as equivalent integrals in different orders of integration. Let's rewrite the integral in the following orders: a. dy dz dx b. dy dx dz c. dx dy dz d. dx dz dy e. dz dx dya. dy dz dx:In this case, we first integrate over z and then y and finally x.

Thus, the equivalent integral is ∫6 to- 6 ∫36 to x^2 ∫36-y to 0 dz dy dx= ∫6 to- 6 ∫36 to x^2 ∫0 to 36-y dz dy dx. Hence, the integral can be rewritten as ∫6 to- 6 ∫36 to x^2 ∫0 to 36-y dz dy dx.b. dy dx dz:In this case, we first integrate over z and then x and finally y.

Thus, the equivalent integral is ∫6 to- 6 ∫36 to x^2 ∫36-y to 0 dz dy dx= ∫6 to- 6 ∫0 to 36 ∫0 to y-36 dz dx dy. Hence, the integral can be rewritten as ∫6 to- 6 ∫0 to 36 ∫0 to y-36 dz dx dy.c. dx dy dz

In this case, we first integrate over z and then y and finally x. Thus, the equivalent integral is ∫6 to- 6 ∫36 to x^2 ∫36-y to 0 dz dy dx= ∫0 to 36 ∫-√(36-y) to √(36-y) ∫-√(36-x^2) to √(36-x^2) dz dx dy.

Hence, the integral can be rewritten as ∫0 to 36 ∫-√(36-y) to √(36-y) ∫-√(36-x^2) to √(36-x^2) dz dx dy.d. dx dz dy:In this case, we first integrate over y and then z and finally x.

Thus, the equivalent integral is ∫6 to- 6 ∫36 to x^2 ∫36-y to 0 dz dy dx= ∫0 to 36 ∫-√(36-y) to √(36-y) ∫-√(36-x^2) to √(36-x^2) dy dz dx.

Hence, the integral can be rewritten as ∫0 to 36 ∫-√(36-y) to √(36-y) ∫-√(36-x^2) to √(36-x^2) dy dz dx.e. dz dx dy:

In this case, we first integrate over y and then x and finally z.

Hence Option E is correct.

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Consider the function f (x, y) = xy - 7y - 49x + 343 on the region on or above y = x^2 and on or below y = 50. Find the absolute minimum value: -7 Find the points at which the absolute minimum value is attained. List your answer sas points in the form (a, b). (0, 50) Find the absolute maximum value: 343 Find the points at which the absolute maximum value is attained. List your answers as points in the form (a, b) (0, 0).

Answers

The absolute maximum value is attained: (0, 0)

The given function is, f(x, y) = xy - 7y - 49x + 343The region is on or above y = x^2 and on or below y = 50. To find the absolute minimum and absolute maximum value of the function, f(x, y), first we will find the critical points of the function.f(x, y) = xy - 7y - 49x + 343 ⇒ ∂f/∂x = y - 49 = 0 ⇒ y = 49 ⇒ ∂f/∂y = x - 7 = 0 ⇒ x = 7Thus, the critical point is (7, 49).Next, we will check for the boundary points. The boundary of the region is y = x^2 and y = 50. The points of intersection are:x^2 = 50 ⇒ x = ±√50 (not in the region)x = ±1.58 ⇒ y = x^2 = 2.50 (not in the region)Also, x = 0 ⇒ y = 0, and x = 0 ⇒ y = 50Thus, the critical points are (7, 49) and (0, 0).f(7, 49) = 7(49) - 7(49) - 49(7) + 343 = -7f(0, 0) = 0 - 7(0) - 49(0) + 343 = 343f(0, 50) = 0 - 7(50) - 49(0) + 343 = -357f(±1.58, 2.50) = ±1.58(2.50) - 7(2.50) - 49(±1.58) + 343 = ∓36.97The absolute minimum value is -7. The points at which the absolute minimum value is attained are (7, 49) and (0, 50).The absolute maximum value is 343. The point at which the absolute maximum value is attained is (0, 0).Hence, the required points are as follows:Points at which the absolute minimum value is attained: (7, 49) and (0, 50)Points at which the absolute maximum value is attained: (0, 0)

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A poll found that 20% of adults do not work at all while on summer vacation. In a random sample of 10 adults, let x represent the number who do not work during summer vacation Complete parts a through e a. For this experiment, define the event that represents a "success." Choose the correct answer below O Adults not working during summer vacation O Adults working during summer vacation b. Explain why x is (approximately) a binomial random variable. Choose the correct answer below. O A. The experiment consists of only identical trials. O B. The experiment consists of identical trials, there are only two possible outcomes on each trial (wworks or does not work). and the trials are independent. O C. The trials are not independent O D. There are three possible outcomes on each trial c. Give the value of p for this binomial experiment. d. Find P(x 4) P(x4) (Round to four decimal places as needed.) e. Find the probability that 2 or fewer of the 10 adults do not work during summer vacation. Plxs2): (Round to four decimal places as needed)

Answers

a) For this experiment, the event that represents a "success" is: Adults not working during summer vacation. (Option a)

b) x is (approximately) a binomial random variable because the experiment consists of identical trials, there are only two possible outcomes on each trial (works or does not work), and the trials are independent. Therefore, (option B) is correct.

c) The value of p for this binomial experiment is 0.2, which is the probability of success (i.e., an adult not working during summer vacation) on a single trial.

d) P(x≥4) is approximately 0.121.
e) the probability that 2 or fewer of the 10 adults do not work during summer vacation is approximately 0.6777.

What is Probability?


Probability is a measure of the likelihood or chance of an event occurring, expressed as a number between 0 and 1, with 0 indicating impossibility and 1 indicating certainty.

So with regards to the above:

a) For this experiment, the event that represents a "success" is: Adults not working during summer vacation. (Option a)

b) x is (approximately) a binomial random variable because the experiment consists of identical trials, there are only two possible outcomes on each trial (works or does not work), and the trials are independent. Therefore, (option B) is correct.

c) The value of p for this binomial experiment is 0.2, which is the probability of success (i.e., an adult not working during summer vacation) on a single trial.

d)  To find P(x≥4), we need to use the binomial probability formula:

P(x≥4) = 1 - P(x<4)

P(x<4) = P(x=0) + P(x=1) + P(x=2) + P(x=3)

Using the binomial probability formula, we can calculate:

P(x=0) = (10 choose 0) * (0.2)⁰ * (0.8)¹⁰ = 0.1074

P(x=1) = (10 choose 1) * (0.2)¹ * (0.8)⁹ = 0.2684

P(x=2) = (10 choose 2) * (0.2)² * (0.8)⁸ = 0.3019

P(x=3) = (10 choose 3) * (0.2)³ * (0.8)⁷ = 0.2013

Therefore,

P(x<4) = 0.1074 + 0.2684 + 0.3019 + 0.2013 = 0.879

And,

P(x≥4) = 1 - P(x<4) = 1 - 0.879 = 0.121

Hence, P(x≥4) is approximately 0.121.

e. To find the probability that 2 or fewer of the 10 adults do not work during summer vacation, we need to calculate P(x≤2). We can use the same formula as in part (d), but only sum up the probabilities for x=0, 1, and 2.

P(x=0) = 0.1074

P(x=1) = 0.2684

P(x=2) = 0.3019

Therefore,

P(x≤2) = P(x=0) + P(x=1) + P(x=2) = 0.1074 + 0.2684 + 0.3019
= 0.6777

Hence, the probability that 2 or fewer of the 10 adults do not work during summer vacation is approximately 0.6777.

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if the measure of and acute angle is represented by x, then the measure of the angle that it is complementary which is represented by 90-x

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The measure of the angle that it is complementary which is represented by 90-x is always true. Option A

What is an acute angle?

An acute angle is simply defined as an angle that measures from 90° and 0°. This means that it is smaller than a right angle.

It is formed in the space between two intersecting lines or planes, or from the intersection of two shapes.

What is a complementary angle?

A complementary angle can be defined as a pair of angles whose sum is equal or equivalent to 90 degrees.

From the information given, we have that;

x is the acute angle

The complementary angle is 90 - x

We can see that the angle x must be complementary to be subtracted from 90 degrees.

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The complete question:

If the measure of an acute angle is represented by x, then the measure of its complement is represented by 90 – X.

always true

sometimes true

never true

In the morning 134 books were checked out from the library.in the afternoon 254 books were checked out and 188 books were checked out in the evening.how many books were checked out in the library that day?

Answers

Answer: 576

Step-by-step explanation:

134+254+188= 576

Why is the probability that a continuous random variable is equal to a single number zero? (i.e. Why is P(X=a)=0 for any number a) [1 sentence]
What is meant by the 95% confidence interval of the mean? [1-2 sentences]
What two quantities do we need to fully describe a normal distribution? [1 sentence]
In determining the sample size for a confidence interval, is the size of the population relevant? [3 sentences]
List the steps in Hypothesis Testing. [4-5 bullets]

Answers

The probability that a continuous random variable is equal to a single number zero because the area under a continuous probability density function (pdf) between any two points, even two extremely close points, is never equal to zero.

In other words, since the continuous random variable is infinite and continuous, the probability that it is equal to a single value is almost zero.

Steps in Hypothesis Testing:State the null and alternative hypotheses.Calculate the test statistic.

Determine the critical value or p-value.Calculate the p-value, if necessary.Make a decision and interpret the results.

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