HELP ME PLEASE!!!!!! Q and R are independent events. if P(Q)=1/8 and P(R)=2/5 find P(Q and R). 19/40,21/40,1/20

Answer:

Step-by-step explanation:

1.7108 is the answer

The ratio of the number of minutes she spends on on math homework to the total she spends on homework each night is 2:5.

What is ratio?

When b does not equal 0, an ordered pair of numbers a and b, represented as a / b, is said to be a ratio. Two ratios are set to be equal in an equation called a proportion. You might express the ratio as 1: 3 for instance, if there is 1 boy and 3 girls (for every one boy there are 3 girls)

Here Andy spends 15 minutes on science homework 20 minutes on math homework 15 minutes on literature homework then,

Total time is ,

Science home work time+ Math home work time+ Literature                    home work time

=> 15+20+15 = 50 mins.

Now the ratio to the number of minutes she spends on on math homework to the total she spends on homework each night then

=> 20 : 50

=> 2 : 5.

Hence the  ratio of the number of minutes she spends on on math homework to the total she spends on homework each night is 2:5.

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X2 = 175 Sofia needed a certain grade on Exam B to perform at the same level as she did on Exam A.

Data are said to be more closely grouped around the mean when the standard deviation is low and more dispersed when the standard deviation is high. The dispersion of the data around the mean value is measured by the standard deviation. It might be helpful when comparing data sets that may have the same mean but a different range. The means of the two numbers 15, 15, 15, 14, 16, and 2, 7, 14, 22, 30 are the same, for instance. The second, though, is unmistakably wider.

given

X1

u1 = 400             u2 = 100

20                          25

X2

Z1 score = Z2 score

X1 - u1 / 20    =    X2 - u2 / 25

460 - 400 / 20   =  X2 -100 / 25

3 = X2 - 100 /25

X2 = 175 score on exam b

X2 = 175 Sofia needed a certain grade on Exam B to perform at the same level as she did on Exam A.

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The origin's coordinates are as follows: (0, 0). A pair of ordered numbers contains one point's coordinates in the coordinate system.

To accomplish this, convert the total number of liters of fuel you purchased into gallons (multiply by 0.219). the initial mileage is subtracted from the total. Then, multiply the distance traveled by the number of gallons of fuel used. Miles per gallon are provided. The concept of proportionality refers to a graphed proportional relationship in which the independent variable is represented by x and the dependent variable by y.

Independent variables describe the input values in a relationship and are typically represented by the x coordinate in the ordered pairs (x, y). When two or more parameters are directly or indirectly proportional to one another, the relationship is denoted by the symbols a=kb or a = k/b, where k denotes the direction of the relationship between the two variables.

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The length of each square Kumar cuts is 10cm and 13cm, and altogether he cuts 130 squares.

Given that,

Length of paper = 65 cm

Breadth of paper = 50 cm

The length of each square,

The greatest common factor of 65 and 50 is 5.

So,

50/5 = 10

65/5 = 13

Therefore the length of each square is 10cm and 13cm.

To find the number of squares cut altogether ,

10 x 13 = 130 squares.

Therefore altogether Kumar cuts 130 squares.

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The multiplication table for 4's underlying pattern: To begin with, let your child know that 4 is an even number. Therefore, no matter what number you multiply by 4 .

A list of items in a sequence is one that is ordered (or events).The number of elements in an ordered sequence determines its length (potentially infinite). Arithmetic sequences, geometric sequences, quadratic sequences, and special sequences are the four primary types of sequences that you need to be familiar with. Number sequences are collections of numbers connected by some kind of rule. If you understand the rule, you can determine the numbers that will come after that in the sequence. Each number differs from the other in this case by 6. In this case, the rule for this sequence is to add 6 each time.

given

The multiplication table for 4's underlying pattern: To begin with, let your child know that 4 is an even number.

Therefore, no matter what number you multiply by 4, the result will always have either 0, 2, 4, 6 or 8 at the end.

With the aid of this method, kids will be able to distinguish multiples of 4, which will make learning the table of four much simpler.

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Answer:

Lisa is 8 years old.

Step-by-step explanation:

If Lisa's father is 42, then we can easily find out what Lisa's age is from the problem. We simply just have to create an equation and then solve it.

The equation:

5x + 2 = 42

Solving said equation:

5x = 42 - 2

5x/5 = 40/5

x = 8

What you do to one side, must be done to the other.

Hope this helps!

The straight line along which the squared vertical distances from the data points are reduced is known as the regression line. minimization of the squared vertical distance between the points and the line for a straight line.

What does regression line mean?

An estimated linear relationship between two variables, which is known as the real but unobserved linear relationship, is shown by a regression line. A given value for the explanatory variable is used to predict (or estimate) the value of the response variable using the equation of the regression line.

What does the term "regression line" mean?

Regress, which is derived from the Latin verb "regressus" (to go back), is the root of the word "regression" (to something). Regression, in this sense, is a method that enables "going back" from muddled, difficult-to-interpret data to a more understandable and valuable model.

                               The degree to which both variables can move in unison is defined by correlation. Regression, however, identifies how a change in the unit of a known variable (p) affects a variable that is being evaluated (q).

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The approximate annual cost of raising a child born in 2013 at age 17 is 15230.

Scatter plots are used to observe and plot relationships between two numeric variables graphically with the help of dots. The dots in a scatter plot shows the values of individual data points.

a) Plot (2, 12,940), (5, 12,970), (8, 12,800), (11, 13,600) 1nd (14, 14420) on graph.

b) (8, 12800) and (14, 14420)

Here, slope m=(14420-12800)/(14-8)

= 1,620/6

= 270

Substitute m=270 and (x, y)=(8, 12800) in y=mx+c, we get

12800=270(8)+c

12800=2160+c

c=10640

Substitute m=270 and c=10640 in y=mx+c, we get

y=270x+10640

c) Now, substitute x=17 in y=270x+10640, we get

y=270×17+10640

y=15230

Therefore, the approximate annual cost of raising a child born in 2013 at age 17 is 15230.

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Using percentage to determine the ounce of iceberg lettuce in the salad from the pie chart, we have 15.2 ounces

A pie chart is a circular chart that is divided into slices to illustrate numerical proportion. In a pie chart, the arc length of each slice (and consequently its central angle and area), is proportional to the quantity it represents. Pie charts are very useful for displaying data and are most commonly used to show percentages or proportional values of different categories relative to the whole.

We can use the concept of percentage to determine the number of ounces of iceberg lettuce present.

In the pie chart, the percentage of ice berg lettuce is 40% and the quantity of salad bought is 38 ounce

40 / 100 = x / 38

0.4 = x / 38

x = 38 * 0.4

x = 15.2 ounces

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Answer:

3w(3w²+5)(3w²-5)

The required graph has been attached below which represents the inequality x ≥ 11 on a number line.

Inequality is defined as mathematical statements that have a minimum of two terms containing variables or numbers that are not equal.

The inequality is given in the question, as follows:

x ≥ 11

In math, a number line can be defined as a straight line with numbers arranged at equal segments or intervals throughout.

A number line is typically shown horizontally and can be extended indefinitely in any direction.

Thus, the graph has been attached below which represents the inequality on a number line.

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Therefore , the solution to the given problem of function comes out to be f(5) = -8.

Mathematics encompasses variables and their changes, equations and related structures, form locations and forms themselves. The relationship between a number of inputs, each of which has an associated output, is referred to as a "function." An association between inputs and outputs that yields a single, distinct outcome is known as a function. Each function has a realm and with a requested request, or scope, allocated to it. The letter f is frequently used to represent , equation functions (x). An x is entered. The four primary kinds of activities that are offered are on activities, each functions, numerous features, within characteristics, and on functions.

Here,

Given :

x -4 -1 3 5

=> f(x) -2 5 4 -8

The value of f(x) at x = 5 is f(5).

=> f(5) = -8

Therefore , the solution to the given problem of function comes out to be f(5) = -8.

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Answer:

-15ft

Step-by-step explanation:

Answer: - 26

-31 + 5 = -26

The required center of dilation and scale factor of a dilation is given as (0, -5) and k = 4/3. Option D is correct.

The scale factor is defined as the ratio of the modified change in length to the original length.

here,
To determine the center of dilation,
Draw a straight line Joining BB' and AA', this line meets at a point (0, -5) so this point is the required center of dilation.

Now,
From the ceter of the dilation,
The scale factor of the dilation is given as,
SF = OB'/OB
SF = 4/3

Thus, the required center of dilation and scale factor of a dilation is given as (0, -5) and k = 4/3. Option D is correct.

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Mia is rolling a pair of 666-sided dice. P(n)p(n)p, left parenthesis, n, right parenthesis models the probability of the event that the sum of the dice is nnn. The number type is more appropriate for the domain of ppp is {n | n ∈ N, 2 ≤ n ≤ 12}

A perfect dice has six faces and is exactly cubical in shape. Each face has one of the numerals 1, 2, 3, 4, 5, or 6, and any two faces can have a different digit.

Now that two dice have been rolled, P(n) simulates the likelihood that the total of the two dice's faces will be n.

The domain of P is therefore given by,

{n | n ∈ N, 2 ≤ n ≤ 12}

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The graph of the Equation and Inequalities is attached below.

The graph is simply a structured representation of the data. It aids in our comprehension of the data. The numerical information gathered through observation is referred to as data.

In a line graph, the information or data is represented as a series of markers, or dots, and is then connected to one another by a straight line.

Usually, data that varies over time is represented with a line graph.

Given:

1. 2y – 4x < 8

The region is shaded by red region.

and, the inequality intersect y axis at 4 and x axis at -2.

2.  -4y > -x + 12

The region is shaded by red region.

and, the inequality intersect y axis at -3 and x axis at 12.

3. | x + 3 |= y

The vertex of the equation is (-3, 0)

4. |2x – 6| + 2 = y

The vertex of the equation is (3, 2)

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The coordinates of the image of point Y following these modifications are thus -2.

After these adjustments, the image of point Y has coordinates that are -2.

The coordinates of the image of point Y following these modifications are thus -2.

The complete question is,
The figure below is translated up 2 units and then rotated 180° counterclockwise. What are the coordinates of the image of point Y after these transformations?

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Answer:

1080 / 17

Step-by-step explanation:

270 divided by 4.25 = 27000 ÷ 425

= [tex]\frac{27000}{425}[/tex] = [tex]\frac{1080}{17}[/tex]

The type of dilation that is used here as well as the factor used is given as: enlargement with scale of 2.5. Option 2

Reducing the object's size by dilation is a change. The items are enlarged or shrunk by dilation. An picture that retains the original shape is created by this alteration. The size of the form does differ, though.

The smaller image is resized into a bigger image from what we can see in the images that we have before us.

We would have to divide all sides of the big square with the corresponding sides of the smaller square

20 / 8 = 2.5

15 / 6 = 2.5

Hence we would see that the scale factor that is used here is 2.5. Therefore the dilation that is used is the enlargement with scale factor 2.5. Option 2 is correct

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The total number of votes is given as 10212

The total number of votes that would be in the city is given as 7400.

How to find the total number of votes

The ratio of votes is in terms of yes to no

This is 7 : 5

Given that the number of no votes is 4255, we can use this number in order to find the yes votes.

7 + 5 = 12

there were 4255 no votes.

we would have:

(5 / 12 )x=  4255

5x = 12 * 4255

5x = 51060

x = 10212

The total number of votes is given as 10212

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When it is assumed that y is directly proportional to x, the variational constant is -4.

A variation is a relationship between a set of values for one variable and another set of values. direct change. If m is a nonzero constant and b = 0, the function y = mx (commonly written y = kx) that results from the equation y = mx + b is known as a direct variation. Variation Theory is a broad theory of learning that is mostly applied in mathematics teaching and pedagogy. It highlights a concept's key components by concentrating on what remains the same and what changes, which creates the possibility for meaningful connections.

given

If y and x are directly proportionate, we would write:

If we include the proportionality constant, or variation, k, we get: y = kx

Any ordered pair from the table can be used to determine the value of y when x=1. y = -4 = k (1) k = -4

When it is assumed that y is directly proportional to x, the variational constant is -4.

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The correct statement is (D) at every vertex.

The vertex of a triangle is the intersection of two sides. Vertices is the term used to describe objects with several vertices.

The ability to write an equation for a line given two points is a prerequisite. The intersection of two lines will then need to be solved, which will give you the intersection's coordinates.

One of the triangle's vertices is at this intersection of two lines.

So, we know that 4 triangles are joined to make them horizontal.

This can be done when the vertex is attached to all 4 triangles.

Then, statement (D) will be a correct statement.

Therefore, the correct statement is (D) at every vertex.

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Answer:

The process of writing all numbers as a product of prime.

Step-by-step explanation:

For example, if we have something like the number 20. We can break that down into two factors. We can say, “well, that's 4 times 5.” And notice, 5 is a prime number. Hope it helps!

The range of the set is 21

The mean of the set is 10.1

The median of the set is 8

The mode of the set is 6

The median is the value that's exactly in the middle of a data set when it is ordered. It's a measure of central tendency that separates the lowest 50% from the highest 50% of values. The steps for finding the median differ depending on whether you have an odd or an even number of data points

Arrange the data points from smallest to largest.

If the number of data points is odd, the median is the middle data point in the list.

If the number of data points is even, the median is the average of the two middle data points in the list.

Given data ,

The range of the set is the difference of the largest and the smallest value in the set

So , the range R = 26 - 4 = 21

The mean of the set be represented as A

The value of A = sum of observations / total number of values in the set

The mean of A = ( 8 + 4 + 12 + 10 + 6 + 25 + 6 ) / 7

The mean of A = 71 / 7

The mean of A = 10.14

Now , the median of the set be represented as B

For calculating the median of the set

Arrange the data points from smallest to largest

The number of elements in the set is 7 which is odd

So , B = { 4 , 6 , 6 , 8 , 10 , 12 , 25 }

The median of B = the middle term of the set

The median B = 8

Now , the mode of the set be represented as C

The mode C = the mode is the value that appears the most often in a data set

So , the number 6 is the value that appear more in the set

The mode C = 6

Hence , the mean , median and mode is 10.14 , 8 and 6 respectively

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Answer:

This is a combination problem, where order doesn't matter.

We want to find the number of ways to choose 3 exercises from a list of 25, which is denoted as 25C3.

This is also equal to (252423) / (321) which is equal to 2300.

Therefore, there are 2300 different groups of 3 exercises the fitness coach can choose from the list of 25 exercises.

Step-by-step explanation:

The time it would take the space craft to reach earth from Mars would be: 1440 hours

the distance from Mars to Earth = 57.6 million km

= 57, 600,000 km

The time it takes the space craft to travel per km = 40000

We would use the formula t = d / v

where t is the unknown time we want to find

d is the distance =  57, 600,000 km

v is the velocity or speed = 40000

Hence we have

t = 57,600,000 / 40000

= 1,440 hours

It would take the space craft 1440 hours to reach mars from earth

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The is 1 four-digit integers that is a perfect squares and perfect cube and it is 4096

A perfect cube is the cube of a whole number, found by multiplying a whole number by itself three times. For example, the number 8 is a perfect cube because 2 × 2 × 2 = 8 .

A perfect square is a number that can be expressed as the product of an integer by itself or as the second exponent of an integer. For example, 25 is a perfect square because it is the product of integer 5 by itself, 5 × 5 = 25.

The only four-digit integers that is a perfect square and a perfect cube is 4096

i.e 64² = 4096

16³ = 4096

Therefore the number of four-digit number that is a perfect square and a perfect cube is 1

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The sum of the lengths of any two sides of a triangle must exceed the length of the third side; therefore, 5+7 > x, which cannot happen if x = 13.

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Answer:

X=3+1/8

Step-by-step explanation:

X * 40/6 = 125/6

(Multiply each side by 6 to get rid of the denominator)
X *40=125
Divide each side by 40
X = 125/40
X= 25/8
X=3+1/8