Suppose that a category of world class runners are known to run a marathon (26 miles) in an average of 146 minutes with a standard deviation of 11 minutes. Consider 49 of the races. Let x = the average of the 49 races. Part (a) two decimal places.) Give the distribution of X. (Round your standard deviation to two decimal places)Part (b) Find the probability that the average of the sample will be between 144 and 149 minutes in these 49 marathons. (Round your answer to four decimal places.) Part (c) Find the 80th percentile for the average of these 49 marathons. (Round your answer to two decimal places.) __ min Part (d) Find the median of the average running times ___ min

Answers

Answer 1


(a)The distribution of X (the average of the 49 races) follows a normal distribution with mean 146 minutes and standard deviation 11 minutes. (b)The probability of the average of the sample being between 144 and 149 minutes is 0.5854.(c)The 80th percentile for the average of these 49 marathons is 157.2 minutes.(d) The median of the average running times is 146 minutes.


Part(a) The distribution of X (the average of the 49 races) follows a normal distribution with mean 146 minutes and standard deviation 11 minutes. Part (b) The probability that the average of the sample will be between 144 and 149 minutes in these 49 marathons can be calculated using the z-score formula: z = (x - mean)/standard deviation
For x = 144, z = (144 - 146)/11 = -0.18
For x = 149, z = (149 - 146)/11 = 0.27,using the z-score table, the probability of the average of the sample being between 144 and 149 minutes is 0.5854 (0.4026 + 0.1828).


Part (c) The 80th percentile for the average of these 49 marathons can be calculated using the z-score formula: z = (x - mean)/standard deviation, For the 80th percentile, z = 0.84 (from z-score table). Therefore, x = 146 + (0.84 * 11) = 157.2 minutes. Part (d) The median of the average running times is 146 minutes. The median is the midpoint of the data which means half of the data is above the median and half of the data is below the median. Therefore, the median of the average running times is equal to the mean.

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Related Questions

24 354÷5 (use long division)

Please help me guys i need this right now

Answers

Answer:

487

or

4870

Step-by-step explanation:

(I might not have done it right)

is it 24,354 / 5 or 2,435 / 5?

Because I got 487

But to check an answer you must multiply

When I multiplied 5 x 487 the answer is 2,435

But 5 x 4870 is 24,350

It has to be one of these

Carmella is purchasing a $105,000 home and her bank is offering her a 30-
year mortgage at a 4.5% interest rate. In order to lower her monthly payment,
Carmella will make a 20% down payment and is considering a purchase of 2
points. How much lower will her monthly payment be if she purchases the
points? (Asking for the difference between the down and the points vs. just the down.)

Answers

The interest charge per month would be around $[tex]532.02[/tex], and the principal payment per month would be about $[tex]399.09[/tex].

What do you mean by your interest?

Your hobbies are the things you find enjoyable to do and the things that you prefer to learn more about. A lack of intriguing conversation: Interesting things hold your attention and arouse your curiosity.

Why is there an interest?

The cost of borrowing money is called interest, and it is typically stated as a percent, such as an annualized rate (APR). By utilizing the money, debtors may accrue interest to lenders, or lenders may pay the interest to borrowers.

We will use annuity formula, which is: [tex]P=C(\frac{1-(1+r)^{-n} }{r} )[/tex]

[tex]P[/tex] is [tex]105,000[/tex]

[tex]C[/tex] is what we need

[tex]r[/tex] is the [tex]0.045/12 = 0.00375[/tex]

[tex]n[/tex] is [tex]12*30 = 360[/tex]

[tex]P=C[\frac{1-(1+r)^{-n} }{r} ][/tex]

[tex]105,000=C[\frac{1-(1+0.00375)^{-360} }{0.00375} ][/tex]

[tex]1.5,000=C[197.3612][/tex]

[tex]C=532.02[/tex]

So monthly payment would be around [tex]532.02[/tex]

Now,

With each point purchase, the interest rate goes down by [tex]0.25[/tex]%, so for [tex]2[/tex] points it will be [tex]4.5[/tex]%[tex]- 2(0.25) = 4[/tex]%

Also, since [tex]20[/tex]% down payment, the loan amount would be [tex](0.8)(105,000) = 84,000[/tex].

Putting these values into the annuity formula we have:

[tex]84000=C[\frac{1-(1+.0..33)^{-360} }{0.0033} ][/tex]

[tex]84000=C(210.47)[/tex]

[tex]C=399.09[/tex]

The monthly payment would be around $[tex]399.09[/tex]

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Solve the equation. |k+ 7| = 3

(-4, 10)
{all real numbers greater than or equal to -10 and less than or equal to -4}
{-4,4)
{-10, -4}

Answers

Answer:

-10 or -4

Step-by-step explanation:

the absolute value of -10 + 7 is 3

the absolute value of -4 + 7 is 3

absolute value just removes the negative sign of what is inside of it.

The cost price of a book is Rs 20 . It is sold at 10% profit. Find its sale price

Answers

Answer:

Cost price (CP) = Rs20

% Profit = 10%

Selling price (SP) = y

By formula:

% Profit = (Profit/CP) x 100%

But Profit= SP - CP

Therefore;

% Profit = [(SP-CP)/C.P)] x 100%

Substituting, we have:

10% = [(y-20)/20] x 100%

10/100 = (y-20)/20

1/10 = (y-20)/20

1 = (y-20)/2

Cross multiply

y - 20 = 2

y = 2 + 20

y = 22

Therefore, the Sale price is Rs 22

Need help with math

Answers

The new coordinates of the two points after rotating the parallel lines 180 degrees clockwise are (2, -7) and (-8, 5).

What are parallel lines?

In geometry, parallel lines can be defined as two lines in the same plane that are at equal distance from each other and never meet.

If the set of parallel lines contains the points (-2, 7) and (8, -5), then the two lines are parallel to each other and have the same slope. We can find the slope of the line that passes through these two points using the slope formula:

slope = (y2 - y1) / (x2 - x1)

slope = (-5 - 7) / (8 - (-2))

slope = -12 / 10

slope = -6 / 5

So, the equations of the two parallel lines are:

y - 7 = (-6 / 5)(x + 2) --- equation 1

y + 5 = (-6 / 5)(x - 8) --- equation 2

To rotate the lines 180 degrees clockwise, we need to negate both the x and y coordinates of the points on the lines. That is, we need to replace each point (x, y) with the point (-x, -y).

So, after the rotation, the new coordinates of the two points will be:

(-(-2), -7) = (2, -7) --- for point (-2, 7)

(-(8), -(-5)) = (-8, 5) --- for point (8, -5)

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By rounding to 1 significant figure , estimate the answer to the questions
216×876​

Answers

200x900=180000-answer

The rounding of the number to 1 significant figure is-

216 × 876 = 180000

What is defined as the significant figure?The term significant figures describes the number of significant single digits (0 to several 9 inclusive) in a scientific notation coefficient.The number of significant figures inside an expression indicates the degree of certainty or precision with where an engineer or scientist states a number.All zeros to the right of the decimals but to the left of a non-zero number in a decimal number between 0 and 1 are not significant.0.00247, for example, only has three significant figures.

216 × 876

This number can be written in form of rounding to 1 significant figure as;

200 × 900 = 180000

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Find the first 4 terms of the sequence represented by the expression 3n + 5

Answers

The first 4 terms of the sequence represented by the expression 3n + 5

is 8, 11, 14 and 17.

Sequence:

In mathematics, an array is an enumerated collection of objects in which repetition is allowed and in case order. Like a collection, it contains members (also called elements or items). The number of elements (possibly infinite) is called the length of the array. Unlike sets, the same element can appear multiple times at different positions in the sequence, and unlike sets, order matters. Formally, a sequence can be defined in terms of the natural numbers (positions of elements in the sequence) and the elements at each position. The concept of series can be generalized as a family of indices, defined in terms of any set of indices.

According to the Question:

Given, aₙ = (3n+5).

First four terms can be obtained by putting n=1,2,3,4

a 1=(3×1+5) = 8

a 2 =(3×2+5) = 11

a 3 =(3×3+5) = 14

a 4 =(3×4+5) = 17

First 4 terms in the sequence are 8, 11, 14, 17.

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Move the manilla point as close to the circle as possible so that the blue arc almost disappears keep the manilla point on the circle​

What previously learned theorem do these transformations reveal

Answers

A theorem which these transformations reveal include the following: theorem of intersecting secants.

What is the theorem of intersecting secants?

In Mathematics and Geometry, the theorem of intersecting secants states that when two lines intersect outside a given circle, the measure of the angle formed by these intersecting lines is equal to one-half (½) of the difference of the two (2) arcs it intercepts.

By applying the theorem of intersecting secants, the value of any of the angle subtended by the intersecting lines can be calculated by using the following mathematical equation:

m∠a = One-half(y – x).

m∠a = ½(y – x).

Where:

x and y represent the angles formed by the intersecting lines.

Therefore, the theorem of intersecting secants describe these set of transformations.

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describe the shape, location, and spread of the data for the number of care types sp unable to get (acv nocarsum) variable. you should generate the appropriate graph(s) and descriptive statistics in support of your answer.

Answers

The better understanding of the data, making it easier to draw conclusions and make decisions based on the data.

In statistics, the spread of the data is used to describe the variability or deviation of a set of data. The location of the data is used to determine the center of the data, and the shape of the data describes the distribution of the data. When it comes to the variable number of care types sp unable to get (acv nocarsum), the data should be analyzed using the appropriate graph(s) and descriptive statistics to determine its shape, location, and spread.
Descriptive statistics:
In descriptive statistics, measures such as mean, mode, median, standard deviation, variance, and range are used to analyze data. These statistics provide a summary of the data in the form of numerical values, making it easy to identify patterns, outliers, and other characteristics of the data.
Graphs:
Graphs are also used in statistical analysis to visually represent the data. There are different types of graphs that can be used, depending on the type of data being analyzed. Commonly used graphs in statistical analysis include histograms, scatterplots, boxplots, and line graphs.
To describe the shape, location, and spread of the data for the number of care types sp unable to get (acv nocarsum) variable, the following steps should be followed:

Step 1: Collect the data.
The first step is to collect the data on the number of care types sp unable to get (acv nocarsum) variable. This data can be obtained from various sources such as surveys, questionnaires, or observational studies.

Step 2: Determine the center of the data.
The center of the data can be determined using measures such as mean, mode, or median. The mean is the average of the data, while the median is the middle value of the data when arranged in order of magnitude. The mode is the value that appears most frequently in the data.

Step 3: Determine the variability of the data.
The variability of the data can be determined using measures such as variance or standard deviation. The variance is the average of the squared differences between each data point and the mean, while the standard deviation is the square root of the variance.

Step 4: Determine the shape of the data.
The shape of the data can be determined using graphs such as histograms, boxplots, or line graphs. Histograms show the distribution of the data, while boxplots show the quartiles and outliers of the data.

Step 5: Interpret the results.
Once the data has been analyzed using the appropriate graph(s) and descriptive statistics, the results should be interpreted to describe the shape, location, and spread of the data for the number of care types sp unable to get (acv nocarsum) variable. This will provide a better understanding of the data, making it easier to draw conclusions and make decisions based on the data.

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what is the surface area

Answers

Answer: 24

Step-by-step explanation:

Surface Area of a rectangular prism = 2 (lh +wh + lw ) Square units.

                                                              = 2[(2*2)+(2*2)+(2*2)]

                                                               = 2[4+4+4]

                                                                =2[12]

                                                                  24

the amount of bacteria present in a medium after t hours is given by a (t )equals 16 e to the power of 0.32 t end exponent. at what rate is the amount of bacteria changing after 12 hours?

Answers

The rate at which the amount of bacteria is changing after 12 hours is 21.698 units/hour.

What is the rate at which the amount of bacteria changing after 12 hours?

The given formula for the amount of bacteria present in a medium after t hours is:

[tex]a(t) = 16e^ (0.32t)[/tex]

Now, we need to find out at what rate the amount of bacteria is changing after 12 hours.

This means we need to find out the derivative of a(t) with respect to t and then substitute t = 12 in the derivative formula to get the rate of change of bacteria after 12 hours.

Differentiating the given formula for a(t) with respect to t, we get:

a'(t) = [tex]16(0.32)e^(0.32t)[/tex]

On substituting, t = 12, we get

a'(12) = [tex]16(0.32)e^ (0.32X12)[/tex]

On solving this, we get a'(12) = 21.698.

Therefore, the rate at which the amount of bacteria is changing after 12 hours is 21.698 units/hour.

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What condition ensures that the bisection method will find a zero of a continuous nonlinear function f in the interval [a, b]? List one advantage and one disadvantage of the secant method compared with New- ton's method for solving a nonlinear equation in one variable. What is the basic difference between an explicit and an implict method for solving IVPs numerically? List at least one advantange for each type.

Answers

Answer:

I zont know i need points

Step-by-step explanation:

Yea im srry

a unity feedback control system is characterized by an open-loop transfer function
G(s)H(s)=k/s(s+10)
determine the system gain k so that the system will have a damping ratio of 0.5. for this value of k, find the rise time, settling time, and peak overshoot. assume that the system is subjected to a step input of 1v

Answers

A unity feedback control system is characterized by an open-loop transfer function G(s)H(s)=k/s(s+10). The system gain k so that the system will have a damping ratio of 0.5 is 4. The corresponding rise time is 2.3s, settling time is 4.4s, and peak overshoot is 0.26.

To determine the system gain k so that the system will have a damping ratio of 0.5, we can use the equation  ζ=1/2ωn. Rearranging the equation yields k=2ωn2. Using the damping ratio of 0.5, this yields k=4.
For this value of k, the rise time, settling time, and peak overshoot can be determined using the following equations:
Rise Time: Tr=4.6/ωn
Settling Time: Ts=4.4/ζωn
Peak Overshoot: Mp=e^(-ζπ/√1-ζ^2)
Given that the damping ratio is 0.5 and the system is subjected to a step input of 1V, we can determine the rise time, settling time, and peak overshoot.
Rise Time: Tr=4.6/ωn=4.6/2=2.3s
Settling Time: Ts=4.4/0.5ωn=4.4/1=4.4s
Peak Overshoot: Mp=e^(-0.5π/√1-0.5^2)=0.26

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Please write how we can find.

Answers

Answer:

15

Step-by-step explanation:

Answer can only be found through estimation.

This means you have to do:

[tex]\frac{50*3}{\sqrt{100} }[/tex]

This will get you 15.

Talia has a daily budget of $94 for a car rental. Write and solve an inequality to find the greatest distance Talia can drive each day while staying with her budget. $30 per day plus $0. 20 per mile

Answers

The most distance Talia can go each day while staying within her budget is 320 miles.

In this case, our goal is to write an inequality before moving on to solve it.

We begin with the daily rental fee and the cost per mile.

This is stated as $30 per day and $0.20 per mile in the question.

She is required to spend a total of $94.

This means that the total cost of the rental automobile and the cost per mile must be $94 or less.

Let m be the maximum number of miles she can travel.

Hence, we may write the inequality as follows: 30 + 0.2 m 94.

This inequality is what we can now solve;

0.2m ≤ 94 - 30

0.2m ≤ 64

m ≤ 64/0.2

320 miles = m

The most distance Talia can go each day while staying within her budget is 320 miles.

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PLEASE HELP!!! WILL MARK BRANLIEST!!!

Answers

Answer:

The point z = 3+4i is plotted as a blue dot, and the two square roots are plotted as a red dot and a green dot. The magnitudes of z and its square roots are shown by the radii of the circles centered at the origin.

Step-by-step explanation:

qrt(z) = +/- sqrt(r) * [cos(theta/2) + i sin(theta/2)]

where r = |z| = magnitude of z and theta = arg(z) = argument of z.

Calculate the magnitude of z:

|r| = sqrt((3)^2 + (4)^2) = 5

And the argument of z:

theta = arctan(4/3) = 0.93 radians

Now, find the two square roots of z:

sqrt(z) = +/- sqrt(5) * [cos(0.93/2) + i sin(0.93/2)]

= +/- 1.58 * [cos(0.47) + i sin(0.47)]

= +/- 1.58 * [0.89 + i*0.46]

Using a calculator, simplify this expression to:

sqrt(z) = +/- 1.41 + i1.41 or +/- 0.2 + i2.8

An experiment was conducted to test the effect of a new cholesterol medicine. Fifteen people were treated with medicine X and 15 with medicine y for a month; then the subjects' cholesterol level was measured. A

significance test was conducted at the 0. 01 level for the mean difference in cholesterol levels between medicine X and medicine Y. The test resulted in t - 2. 73 and p = 0. 3. If the alternative hypothesis in

question was Mo: px - WY* 0, where wx equals the mean cholesterol level for subjects taking medicine X and by equals the mean cholesterol level for subjects taking medicine Y, what conclusion can be drawn? (2

points)

There is sufficient evidence that there is a difference in mean cholesterol level when using medicine X and medicine Y.

There is not a significant difference in mean cholesterol level when using medicine X and medicine Y.

There is sufficient evidence that medicine X towers cholesterol levels more than medicine Y.

The proportion of subjects who lowered their cholesterol level with medicine X is greater than the proportion of subjects who lowered their cholesterol level with medicine Y.

There is insufficient evidence that the proportion of people who lowered cholesterol level on medicine X and Y is different.

Answers

The right answer is provided by: Taking into account the hypothesis tested and the p-value of the test.

There is enough proof to conclude that using drugs X and Y results in different mean cholesterol levels.

What theories are being tested?

If there is no difference in the cholesterol levels, then the null hypothesis is tested, which is:

H₀:Hₓ-H

It is determined whether there is a difference at the alternative hypothesis, so:

H₀:Hₓ-H≠0

The p-value of 0.003 0.01 leads us to reject the null hypothesis and determine that there was a difference, hence the following is the right response:

There is enough proof to conclude that using drugs X and Y results in different mean cholesterol levels.

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Write the first four terms of the sequence defined by a n = 5
{5, if n=1
a n -1 -5, if n>1

Answers

Answer:

The sequence is defined as follows:

a1 = 5

an = an-1 - 5, for n > 1

Using this definition, we can find the first four terms of the sequence as follows:

a1 = 5

a2 = a1 - 5 = 5 - 5 = 0

a3 = a2 - 5 = 0 - 5 = -5

a4 = a3 - 5 = -5 - 5 = -10

Therefore, the first four terms of the sequence are: 5, 0, -5, -10.

A rectangle has length 64mm and 37mm each correct to the nearest millimetre.
(a) Write down the lower bound for the length.
(b) Calculate the lower bound for the perimeter of the rectangle.

Answers

Step-by-step explanation:

(a) To find the lower bound for the length of the rectangle, we need to subtract half of the smallest unit of measurement from the given measurement.

The smallest unit of measurement given is 1 mm, so half of that is 0.5 mm.

Therefore, the lower bound for the length of the rectangle is:

64 mm - 0.5 mm = 63.5 mm

(b) The perimeter of a rectangle is calculated by adding up the length of all four sides.

The lower bounds for the length and width of the rectangle are 63.5 mm and 36.5 mm, respectively.

So, the lower bound for the perimeter is:

2(63.5 mm + 36.5 mm) = 2(100 mm) = 200 mm

Answer and explanation below. Credits to Chris, Mechanical engineering college, Master's degree

The table below shows the heights, in metres
(m), of three different plants.
Put the plants into ascending order based on
their height.
Plant:
Rose=59/100
Barberry=7/10
Holly:11/20
Answer please

Answers

Answer:

7/10

59/100

11/20

Step-by-step explanation:

59/100=59/100

7/10=70/100

11/20=55/100

Which of the following examples satisfy the hypotheses of the Extreme Value Theorem on the given interval?
A. f(x)=1/x on −10≤x≤10
B. g(x)=6x^2+3 on 0≤x≤4
C. k(x)={3x^2+9 for 0≤x<2, 12x for 2≤x≤10} on 0≤x≤10
D. h(x)=(e^x)/x on 2≤x≤16
E. m(x)=6x^3+x+1 on −4

Answers

The function that satisfies the hypotheses of the Extreme Value Theorem on the given interval is given by

B. g(x)=6x^2+3 on 0≤x≤4

D. f(x) = (e^x)/x for 2 ≤ x ≤ 16.

Step 1: State the Extreme Value Theorem

The Extreme Value Theorem states that if a function is continuous on a closed interval [a,b], then the function must have a maximum and a minimum on the interval.

Step 2: Check for continuity and closed interval for each function

A. f(x) = 1/x on −10 ≤ x ≤ 10

The function f(x) = 1/x is continuous on the interval (-10, 0) and (0, 10).

However, since the interval given is [−10, 10], we see that the function is not continuous over the closed interval.

Hence the function does not satisfy the hypotheses of the Extreme Value Theorem.

B. g(x) = 6x^2+3 on 0 ≤ x ≤ 4

The function g(x) is continuous on the interval [0, 4].

Therefore, this function satisfies the hypotheses of the Extreme Value Theorem on the given interval.

C. k(x) = {3x^2+9 for 0 ≤ x < 2, 12x for 2 ≤ x ≤ 10} on 0 ≤ x ≤ 10

The function k(x) is continuous on the interval [0, 2) and (2, 10]. H

However, since the interval given is [0, 10], we see that the function is not continuous over the closed interval.

Hence the function does not satisfy the hypotheses of the Extreme Value Theorem.

D. h(x) = (e^x)/x for 2 ≤ x ≤ 16The function h(x) is continuous on the interval [2, 16].

Therefore, this function satisfies the hypotheses of the Extreme Value Theorem on the given interval.

E. m(x) = 6x^3+x+1 on −4 < x < 3

The function m(x) is continuous on the interval (-4, 3).

However, since the interval given is [-4, ∞), we see that the function is not continuous over the closed interval.

Hence the function does not satisfy the hypotheses of the Extreme Value Theorem.

Therefore, the only function that satisfies the hypotheses of the Extreme Value Theorem on the given interval is given by

B. g(x)=6x^2+3 on 0≤x≤4

D. f(x) = (e^x)/x for 2 ≤ x ≤ 16

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Express each of the following without using decimals: Rs 5. 25

Answers

Rs 5.25 can be expressed without decimals as Rs 525/100 or as 5 1/4 (or 5 ¼) using mixed numbers. Both methods allow us to represent the value of Rs 5.25 accurately without using decimal notation.

To express Rs 5.25 without using decimals, we need to convert it into a fraction with a numerator and a denominator. One way to do this is by multiplying both the numerator and the denominator by 100 to eliminate the decimal point.

So, Rs 5.25 can be written as Rs 525/100. This is also known as a fraction in its simplest form, as both the numerator and denominator have no common factors other than 1.

Another way to express Rs 5.25 without decimals is to use mixed numbers. A mixed number is a whole number combined with a fraction. To convert a decimal to a mixed number, we need to find the whole number part and the fraction part.

To find the whole number part, we can simply drop the decimal point and write the digits to the left of it. In this case, the whole number part is 5.

To find the fraction part, we need to subtract the whole number part from the original number and simplify the fraction. In this case, Rs 5.25 can be written as 5 and 1/4 (or 5 ¼), where the fraction part is 1/4.

In conclusion, Rs 5.25 can be expressed without decimals as Rs 525/100 or as 5 1/4 (or 5 ¼) using mixed numbers. Both methods allow us to represent the value of Rs 5.25 accurately without using decimal notation.

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0 | 40
1 | 40.75
3 | 42.5
5 | 44
7 | 45.25

Use the line segment that connects ______ and _______ to estimate the vine length after 4 days.

After 4 days, the vine length is about ______.

The top is a chart Please help me!!!

Answers

Use the line segment that connects (3, 42.5) and (5, 44) to estimate the vine length after 4 days.

How to determine the lengths after 4 days

Given the table of values

To do this, we make use of linear interpolation

Such that the points closest to day 4 are (3, 42.5) and (5, 44)

The slope of the line passing through the two points can be found using the formula:

m = (y2 - y1) / (x2 - x1)

where (x1, y1) = (3, 42.5) and (x2, y2) = (5, 44).

Thus, we have:

m = (44 - 42.5) / (5 - 3) = 0.75

So, we have

y = 0.75x + b

Using the point (3, 42.5), we get:

42.5 = 0.75(3) + b

Solving for b, we get:

b = 42.5 - 0.75(3)

b = 40.25

So, the equation is

y = 0.75x + 40.25

To estimate the vine length after 4 days, we substitute x = 4 into the equation and solve for y:

y = 0.75 * 4 + 40.25

y = 43.25

Therefore, the vine length after 4 days is estimated to be about 43.25 units.

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I NEED HELP ON THIS ASAP!!

Answers

a) Graph this system of inequalities, we can plot the lines x = 0, y = 0, x = 260, y = 320, and x + y = 380

b) The maximum profit of $5200 achieved.

Define the term selling profit?

Selling profit is the profit that a business makes on the sale of its products or services. It is the difference between the selling price and the cost of product.

a) Let x be the number of boards of mahogany sold and y be the number of boards of black walnut sold. Then, the constraints of the problem can be represented by the following system of inequalities:

x ≥ 0 (non-negative constraint)

y ≥ 0 (non-negative constraint)

x ≤ 260 (maximum number of mahogany boards available)

y ≤ 320 (maximum number of black walnut boards available)

x + y ≤ 380 (maximum number of boards that can be sold)

To graph this system of inequalities, we can plot the lines x = 0, y = 0, x = 260, y = 320, and x + y = 380 on a coordinate plane and shade the feasible region that satisfies all of the constraints. The feasible region is the area that is bounded by these lines and includes the origin (0, 0).

b) The profit function P(x, y) can be defined as follows:

P(x, y) = 20x + 6y

To maximize the profit, we need to find the values of x and y that satisfy all of the constraints and maximize the profit function P(x, y).

One way to do this is to use the corner-point method. We can evaluate the profit function at each of the corners of the feasible region and find the corner that gives the maximum profit.

The corners of the feasible region are (0, 0), (0, 320), (260, 0), and (120, 260).

P(0, 0) = 0

P(0, 320) = 6(320) = 1920

P(260, 0) = 20(260) = 5200

P(120, 260) = 20(120) + 6(260) = 4720

Therefore, the maximum profit of $5200 can be achieved by selling 260 boards of mahogany and 0 boards of black walnut.

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An item is regularly priced at $19. Debra bought it at a discount of 60% off the regular price.

Answers

Answer:

Step-by-step explanation:

Regular price:$19

60 per cent of $19 is 11.4 dollars.

but if ypu are looking for how much did she pay then it is..

19-11.4=$7.6

Purchasing the correctly sized BMX bike is based on the height of the rider. In order to fit a customer, the salesperson can use the equation b=0. 29h+1. 35
where b
is the size of the BMX bike frame in inches and h
is the height of the rider in inches

Answers

The slope in the equation b = 0.29h + 1.35 is the measure of the rate at which the bike frame size changes with the height of the rider.

The slope in the equation b = 0.29h + 1.35 refers to the coefficient of the variable h, which represents the height of the rider. The slope is the measure of the rate at which the bike frame size changes with the height of the rider.

In this equation, the slope is 0.29, which means that for every inch increase in the rider's height, the bike frame size increases by 0.29 inches. The slope is a crucial component of the equation as it determines the proportionality of the two variables.

Moreover, the slope is essential in analyzing the relationship between the rider's height and the bike frame size.

It plays a vital role in determining the appropriate size of the BMX bike frame and analyzing the relationship between the two variables.

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Complete Question:

Purchasing the correctly sized BMX bike is based on the height of the rider. In order to fit a customer, the salesman can use the equation b 0.29h +1.35 where b is the size of the BMX bike frame in inches and h is the height of the rider in inches.

Which sentence explains the slope in the equation?

Further Mathematics Assignment 1) A bowl contains 7 cooked and 5 uncooked In how many ways can: a) 2 cooked or 3 uncooked eggs be selected. b) 2 cooked and 3 uncooked eggs be selected.
Please this is my school homework!
Please HELP!!!
15 MRKS​

Answers

Therefore, the total number of ways to select 2 cooked and 3 uncooked eggs is 210 ways.

What is combination?

In mathematics, a combination is a way of selecting items from a collection, such that (unlike permutations) the order of selection does not matter. In other words, a combination is a selection of items from a larger set, without regard to the order in which they are chosen. The number of combinations of size r that can be chosen from a set of n elements is denoted by the symbol C(n, r), and is given by the formula:

C(n, r) = n! / (r! * (n-r)!)

where n! (pronounced "n factorial") is the product of all positive integers up to n, and r! is the product of all positive integers up to r.

Here,

a) To find the number of ways to select 2 cooked or 3 uncooked eggs, we need to use the combination formula, which is:

ⁿCₓ= n! / r!(n-r)!

where n is the total number of eggs, r is the number of eggs we want to select, and ! represents factorial.

For 2 cooked eggs, we can select them in:

⁷C₂ = 7! / 2!(7-2)! = 21 ways

For 3 uncooked eggs, we can select them in:

⁵C₃ = 5! / 3!(5-3)! = 10 ways

Therefore, the total number of ways to select 2 cooked or 3 uncooked eggs is:

21 + 10 = 31 ways

b) To find the number of ways to select 2 cooked and 3 uncooked eggs, we need to use the product rule of counting. That is, we need to multiply the number of ways to select 2 cooked eggs and 3 uncooked eggs.

The number of ways to select 2 cooked eggs is:

⁷C₂ = 21 ways

The number of ways to select 3 uncooked eggs is:⁵C₃ = 10 ways

Therefore, the total number of ways to select 2 cooked and 3 uncooked eggs is:

21 x 10 = 210 ways

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could someone help out?

Answers

Answer:

  r ≈ 44.25 cm

Step-by-step explanation:

You want the hypotenuse of a right triangle in which the side adjacent to the angle of 57° is 24.1 cm.

Cosine

The cosine relation is ...

  Cos = Adjacent/Hypotenuse

  cos(57°) = (24.1 cm)/r

Solution

Solving for r gives ...

  r = (24.1 cm)/cos(57°) ≈ 44.25 cm

The length r is about 44.25 cm.

__

Additional comment

The calculator shown in the attachment has its angle mode set to degrees.

<95141404393>

Find the value of X.
Numbers1,3,4,5,8,9

Answers

The value of x for each circle is calculated as follows:

1. x = 148°

3. x = 82°

4. x = 135°

5. x = 7

8. x = 6

9. x = 13

Define the term Circle identities?

The Circle identities refer to a set of fundamental identities in trigonometry that relate the six trigonometric functions of an angle in a right-angled triangle.

1. Given, SR = ST

then, arcSR = arcST = x°

and arcRT = 64°

Sum of arc,

x + x +64 =360

x = 148°

3. Given, JK=LM

then, arcJK=arcLM

So, x=82°

4. Given, BA=AC =9

Then, arcBA = arcAC = x°

and arcBC = 90°

Sum of arc,

x + x +90 =360

x = 135°

5. Given, arc are equal then side also equal

2x+4=18

x=7

8. Given that, Circle M similar to circle P, and arc are equal so, side also equal

2x+24=6x

x=6

9. Given that, Circle V similar to circle W,

arcYZ + 198 =360

arcYZ = 162°

Now, arcTU=arcYZ

Then, 9x-78 = 3x

So, x=13

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just need help with part (b) please

Answers

In response to the stated question, we may state that As a result, the formula for the sequence's nth term is: [tex]a_n = a _1 * r^{(n-1) (n-1)}[/tex]

What is Sequences?

In mathematics, a sequence is an ordered list of items. Elements can be numbers, functions, or other mathematical objects. A series is commonly expressed by putting the phrases in parentheses and separating them with commas. A natural number series, for example, can be denoted as: (1, 2, 3, 4, 5, ...) Similarly, the even number series is labelled as follows: (2, 4, 6, 8, 10, ...) A series can be finite or infinite depending on whether it has a finite or infinite number of words.

a. Since the difference between subsequent terms is constant, the series 5, 7, 8,... is an arithmetic sequence. The usual difference is 2, specifically. As a result, the formula for the sequence's nth term is:

[tex]a_n = a_1 + (n-1)d[/tex]

where a 1 represents the first term, d represents the common difference, and n represents the term number. Using the provided values, we get:

[tex]a_n = 5 + (n-1)2\\a_n = 2n + 3[/tex]

b. Since the ratio between subsequent terms is constant, the series 6, 30, 150,... is a geometric sequence. The common ratio is 5, specifically. As a result, the formula for the sequence's nth term is:

[tex]a_n = a _1 * r^{(n-1) (n-1)}[/tex]

where a 1 denotes the first term, r the common ratio, and n the term number

[tex]a_n = 6 * 5^{(n-1) (n-1)}[/tex]

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