Scatter plot, 8 grades help please!!!

The area of any other shape can be broken down into smaller rectangles and the area of each rectangle can be calculated and added together to get the total area.

Kathy is organizing her desktop, which measures 22 inches by 4 feet. To calculate the area of Kathy’s desktop, we can use the formula for area, which is length multiplied by width. In this case, the length is 4 feet and the width is 22 inches. To make the measurements easier to work with, we can convert the length into inches. There are 12 inches in a foot, so 4 feet is equal to 48 inches. Now, the length of Kathy’s desktop is 48 inches and the width is 22 inches. To calculate the area, we multiply the length (48 inches) by the width (22 inches). The area of Kathy’s desktop is 1,056 square inches.

To further explain the concept of area, it is the amount of two-dimensional space that a shape takes up. It is measured in square units, such as square inches, square feet, or square yards. To calculate the area of any shape, you need to know its length and width. To calculate the area of a rectangle, you multiply the length by the width. The area of any other shape can be broken down into smaller rectangles and the area of each rectangle can be calculated and added together to get the total area.

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Shawna's new score can be represented by the equation is New Score = Current Score + (Result of Black Cube) + (Result of Red Cube). So, Shawna's new score is 2.

In the game that Shawna is playing, rolling the black cube results in a positive number, while rolling the red cube results in a negative number. We are told that Shawna's current score is 4, which means that she has accumulated 4 points up to this point in the game.

Next, we are told that Shawna rolls a red 5 and a black 3. This means that the red cube resulted in a negative 5 and the black cube resulted in a positive 3.

To calculate Shawna's new score, we can add the results of these two rolls to her current score. However, we need to be careful to subtract the negative number, rather than adding it. This is because a negative number is actually a decrease in score.

Therefore, we can use the following equation to calculate Shawna's new score:

New Score = Current Score + (Result of Black Cube) + (Result of Red Cube)

Substituting in the values that we know, we get:

New Score = 4 + 3 + (-5)

Simplifying, we can combine the positive and negative numbers:

New Score = 4 - 2

Therefore, Shawna's new score is 2. This means that after rolling a red 5 and a black 3, her score has decreased by 2 points from her original score of 4.

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If The total revenue earned (in dollars) from selling the books is given by the function R-32. 80N.The equation relating the profit P (in dollars) to the number of books N is P = 16.85N - 750.

The profit made by the company is the difference between the total revenue earned and the total production cost, so we can write:

P = R - C

Substituting the expressions for R and C, we get:

P = 32.80N - (15.95N + 750)

Simplifying the right-hand side, we get:

P = 16.85N - 750

This equation shows that the profit made by the company is a linear function of the number of books printed. The slope of the line is the revenue per book (32.80 dollars), minus the cost per book (15.95 dollars), which is 16.85 dollars.

The intercept of the line is the fixed cost for editing (750 dollars). The equation can be used to estimate the profit for any given number of books printed, and to determine the break-even point, which is the number of books that need to be sold to cover the total production cost.

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a) The Equation is  7.65x + 50 = 149.45.

b) The customer used the car for 13 hours.

c)  If the car used for 2 days i.e., 48 hours then the amount will be $471.12

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given that;

Members of a car sharing program pay a fee of $50 per month plus $7.65 for every hour they use a car.

And, a members bill was $149.45 last month.

a) Let number of hours for the customer use a car last month = x

So, 7.65x + 50 = 149.45

7.65x = 149.45 - 50

7.65x = 99.45

x = 13

b) The customer used the car for 13 hours.

c) If the car used for 2 days i.e., 48 hours

= 7.65x + 50

= 7.65(48)+ 50

= 471.2

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For given linear equations, 27hx -9y = -18 and y = 1 - 6x

h will be 2.

What is a linear equation, exactly?

When the greatest power of a variable is 1, the equation is said to be linear. Another term for it is a one-degree equation. The standard form of a linear equation with one variable is Ax + B = 0. There are three variables in this equation: x, A, and B. A denotes a coefficient. A linear equation with only two variables is commonly written as Ax + By = C. There are three more constants in addition to the constant C: the variables x and y, the coefficients A and B, and the variables.

Now,

As general equation of a line is y=mx + c where m=slope and c=constant

and here given lines are  27hx -9y = -18 and y = 1 - 6x

transforming these into general equations

y=-3hx+2 where m=-3h

and y=-6x+1    where m=-6

Now As slope of parallel lines is equal

therefore, -3h=-6

h=6/3

h=2

Hence,

           h will be 2.

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The length of B'C' after the translation of the original object is; B'C' = 3 units

Translation in transformation is simply defined as the displacement of a figure or a shape from one place to another. In translation, a figure can move upward, downward, right, left or anywhere in the coordinate system. In translation, only the position of the object changes, its size remains the same.

Now, from the attached image, we see that;

AB = 7 units

BC = 3 units

CD = 4 units

DA = 5 units

Now, by virtue of the definition of translation, it means that the translated object will retain the same dimensions. Thus;

B'C' = 3 units

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Answer:

2 • (10ab + 35a - 12b2 - 42b)

Step-by-step explanation:

(20ab + 70a - 84b) - (23•3b2)

20ab + 70a - 24b2 - 84b =

2 • (10ab + 35a - 12b2 - 42b)

A)  The mean of 2018 scores: μ₂₀₁₈ = 75

 The mean of 2019 scores: μ₂₀₁₉ = 75

 The standard deviation of 2018 scores: s₂₀₁₈ = 2.07

 The standard deviation of 2019 scores: s₂₀₁₉ = 5.26

B) The primary difference is that variation is higher in the 2018 season than the 2019 season.

A)

We know that the mean is nothing but the sum of all scores divided by the number of scores.

Thus the mean for 2018 scores is:

μ₂₀₁₈ = (73 + 77 + 78 + 76 + 74 + 72 +74 + 76)/8

μ₂₀₁₈ = 75

Similarly the mean for 2019 scores is:

μ₂₀₁₉ = (70 + 69 + 74 + 76 + 84 + 79 + 70 + 78)/8

μ₂₀₁₉ = 75

We know that the formula for the standard deviation is:

[tex]s=\sqrt{\frac{\sum (x_i - \bar{x})^2}{n-1} }[/tex]

where s sample standard deviation

n the size of the sample

[tex]x_i[/tex] each value from the sample

[tex]\bar{x}[/tex] the sample mean

Using this formula, the standard deviation for 2018 scores is:

s₂₀₁₈ = [tex]\frac{\sqrt{ (73-75)^2 + (77-75)^2 + (78-75)^2 + (76-75)^2 + (74-75)^2 + (72-75)^2 +(74-75)^2 + (76-75)^2} }{7}[/tex]

s₂₀₁₈ = 2.07

And the standard deviation for 2019 scores is:

s₂₀₁₉ = [tex]\frac{\sqrt{ (70-75)^2 + (69-75)^2 + (74-75)^2 + (76-75)^2 + (84-75)^2 + (79-75)^2 +(70-75)^2 + (78-75)^2} }{7}[/tex]

s₂₀₁₉ = 5.26

B)

We cwn observe that both the two years have the same mean but the 2019 scores have higher variation as compared to 2018 scores.

Thus, the variation in scores was higher in 2019.

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Find the complete question below.

By empirical rule, 99.7% of the students have a grade point average which is between 1.38 and 3.84.

Suppose that the grade point average of undergraduate students at one university has a bell-shaped distribution with a mean of 2.61 and a standard deviation of 0.41.

Here, μ = 2.61 , σ = 0.41

Using the empirical rule :

The first part of the empirical rule states that 68% of the data values will fall within 1 standard deviation of the mean. To calculate "within 1 standard deviation," you need to subtract 1 standard deviation from the mean, then add 1 standard deviation to the mean. That will give you the range for 68% of the data values.

2.61 − 0.41 = 2.2

2.61 + 0.41 = 3.02

The range of numbers is 2.2 to 3.02

The second part of the empirical rule states that 95% of the data values will fall within 2 standard deviations of the mean. To calculate "within 2 standard deviations," you need to subtract 2 standard deviations from the mean, then add 2 standard deviations to the mean. That will give you the range for 95% of the data values.

2.61 − 2(0.41) = 1.79

2.61 + 2(0.41) = 3.43

The range of numbers is 1.79 to 3.43

Finally, the last part of the empirical rule states that 99.7% of the data values will fall within 3 standard deviations of the mean. To calculate "within 3 standard deviations," you need to subtract 3 standard deviations from the mean, then add 3 standard deviations to the mean. That will give you the range for 99.7% of the data values.

2.61 − 3(0.41) = 1.38

2.61+3(0.41) = 3.84

The range of numbers is 1.38 to 3.84.

Hence, 99.7% of the students have a grade point average which is between 1.38 and 3.84.  

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Answer:

atq= let no.be x and y

x= 4y-3.......(1)

x-2y=7....(2)

subtracting both eqn

x-x+2y=4y-3-7

2y=4y-10

-2y= -10

y=5 ........second no.

first no...x=7+2y=7+10=17.......first no.

Step-by-step explanation:

Answer: To solve this problem, we can use the formula for calculating the future value of an investment:

FV = PV * (1 + r/n)^(nt)

where:

FV is the future value of the investment

PV is the present value of the investment (the initial amount Louise has to invest)

r is the annual interest rate (4.28%)

n is the number of times the interest is compounded in a year

t is the number of years the investment is made

Since the interest is compounded monthly, we need to convert the annual interest rate to a monthly rate:

r/12 = 4.28% / 12 = 0.3566666666666667%

Now, we can use the formula to calculate the future value of Louise's investment:

FV = $20,000 * (1 + 0.3566666666666667%)^(12t)

We can use trial and error or iterative methods to find the value of t that satisfies the condition: FV = $30,000.

A quick approximation is to use the formula for simple interest:

FV = PV * (1 + r * t) = $20,000 * (1 + 0.0428 * t)

t = ($30,000 - $20,000) / ($20,000 * 0.0428) = 2.857142857142857 years, or approximately 2.9 years.

This is an approximation, but it should be close to the actual answer. To get a more accurate answer, we can use an iterative method, such as Newton-Raphson or bisection, to solve for t in the formula above.

Step-by-step explanation:

Shandra is expected to select a pineapple chew about 56 times in the next 400 selections.

Based on the given results, Shandra selected a pineapple chew 8 times out of 57 selections. To estimate the expected number of times she would select a pineapple chew in the next 400 selections, we can use the proportion of pineapple chews selected in the first 57 selections:

The proportion of pineapple chews selected = 8/57

To estimate the expected number of pineapple chews in the next 400 selections, we can multiply the proportion by the total number of selections:

Expected number of pineapple chews in the next 400 selections = (8/57) x 400

expected number of pineapple chews in the next 400 selections = 56.14

Rounding to the nearest whole number, we would expect Shandra to select a pineapple chew about 56 times in the next 400 selections.

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The dilated quadrilateral is A' ( -2 , 4 ) , B' ( 4 , 4 ) , C' ( 6 , -2 ) and D' ( 0 , -2 )

Resizing an item uses a transition called Dilation. Dilation is used to enlarge or contract the items. The result of this transformation is an image with the same shape as the original. However, there is a variation in the shape's size. Dilation transformations ensure that the shape will stay the same and that corresponding angles will be congruent

Given data ,

Let the quadrilateral be represented as ABCD

Now , the coordinates of ABCD is given as

A ( -1 , 2 ) , B ( 2 , 2 ) , C ( 3 , -1 ) and D ( 0 , -1 )

Now , when the dilation is of the scale of (x,y) → (2x, 2y) about the origin

Substituting the values in the equation , we get

A' ( x , y ) = A ( 2 ( -1 ) , 2 ( 2 ) )

On simplifying the equation , we get

The coordinates of A' is = A' ( -2 , 4 )

The coordinates of B' is = B' ( 4 , 4 )

The coordinates of C' is = C' ( 6 , -2 )

The coordinates of D' is = D' ( 0 , -2 )

Hence , the dilated figure is solved

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There are 11 observations in the subset data.e need to count the number of observations in the subset data.

1. First, we need to filter out the observations that have a date on or after May 1, 1975. For this, we can use the following code:

x3[x3$DATE >= "1975-05-01",]

2. Then, we need to count the number of observations in the subset data. We can do this by using the nrow() function:

nrow(x3[x3$DATE >= "1975-05-01",])

The output is 11.

If we wanted to subset the data set to include only observations that have a date on or before February 1, 1985, we can use the following code:

x3[x3$DATE <= "1985-02-01",]

Then, we can count the number of observations in the subset data usingthe nrow() function:

nrow(x3[x3$DATE <= "1985-02-01",])

The output is 19.

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Answer:

A

Step-by-step explanation:

(f - g)(x)

= f(x) - g(x)

= 3x + 2 - (2x - 2) ← distribute parenthesis by - 1

= 3x + 2 - 2x + 2 ← collect like terms

= x + 4

The values of f and g based on the given diagram ABCE is 6cm and 8cm respectively.

Area of ABCE = 60cm²

Area of ABCD = 48cm²

Area of ADE = Area of ABCE - Area of ABCD

= 60 cm² - 48 cm²

= 12 cm²

Area of ADE = 1/2 × base × height

12 = 1/2 × 4 × h

12 = 4/2h

12 = 2h

divide both sides by 2

h = 12/2

h = 6 cm

AD = height = BC = 6 cm

Area of ABCD = length × width

48 = l × 6

48 = 6l

l = 48/6

l = 8 cm

In conclusion, f and g are 6cm and 8cm respectively.

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The best way to represents the change in the vertices of rectangle ABCD to rectangle A'B'C'D' in the attached graph is given by :

option A. (x, y ) → (2x, 2y).

From the attached graph we have,

Coordinates of rectangle ABCD are :

Coordinate of vertex A ( -3, -2 )

Coordinate of  vertex  B ( -3,  2 )

Coordinate of  vertex  C ( 3, 2 )

Coordinate of  vertex  D ( 3, -2 )

And coordinates of A'B'C'D' are:

Coordinate of  vertex  A' ( -6, -4 )

Coordinate of  vertex  B' ( -6, 4 )

Coordinate of  vertex  C' ( 6, 4 )

Coordinate of  vertex D' ( 6, -4 )

Coordinate of rectangle ABCD gets dilated by the scale factor of :

Scale factor of 'x' coordinate  = -6 / -3

                                                 = 2

Scale factor of 'y' coordinate  = -4 / -2

                                                 = 2

Change in the vertices of rectangle ABCD to A'B'C'D' is given by :

( x , y ) → ( 2x , 2y )

Therefore, the vertices of rectangle ABCD changed to A'B'C'D' is equal to option A. ( x , y ) → ( 2x , 2y ).

The above question is incomplete, the complete question is:

Which best represents the change in the vertices of rectangle ABCD to form rectangle A'B'C'D'?

A) (x, y ) → (2x, 2y)

B) (x, y ) → (1. 5x, 1. 5y)

C) (x, y ) → (3x, 3y)

D) (x, y ) → (4x, 4y)

Graph is attached.

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The required, approximate volume of the sphere is 113.04 cubic inches.

Volume is defined as the mass of the object per unit density while for geometry it is calculated as profile area multiplied by the length at which that profile is extruded.

Here,
The formula for the volume of a sphere is V = (4/3)πr³, where r is the radius of the sphere.

If the radius of the sphere is 3 inches, we can substitute this value into the formula and use 3.14 to approximate π,

V = (4/3) x 3.14 x 3³

V = (4/3) x 3.14 x 27

V = 113.04 cubic inches

Therefore, the approximate volume of the sphere is 113.04 cubic inches.

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The arrow labeled C represents a transfer of chemical energy to mechanical energy. False, this is because, the gas released does not do any work.

The arrow labeled A represents a transfer of solar energy to chemical energy. True, chemical energy is stored in starch molecules

The arrows that represent the release of carbon dioxide is C. This is combustion and it occurs in nonliving things. The process involves the burning of carbon materials.

The conservation energy is demonstrated by arrow A since we can show it by a chemical reaction.

The carbon cycle is the process by which carbon atoms circulate through the Earth's atmosphere, oceans, and landmasses. In the carbon cycle, carbon is exchanged between the atmosphere, biosphere, hydrosphere, and geosphere. The main components of the carbon cycle include photosynthesis, cellular respiration, decomposition, and combustion.

In photosynthesis, plants take in carbon dioxide from the atmosphere and convert it into organic compounds, which serve as food for the plants and are stored in their tissues.

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The number of solutions of the system of equations is given as follows:

D. Infinitely many solutions.

The system of equations is defined as follows:

The second equation was obtained multiplying the first equation by 3, meaning that the two equations are multiples, and thus the system of equations has an infinity number of solutions and the correct option is given by option D.

The system of equations is defined as follows:

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The expression equivalent to  -2x +3+ 7y + 4x -5 is 2x+7y-2.

What exactly are expressions?

Expressions in mathematics are mathematical assertions that comprise at least two phrases that contain numbers, variables, or both, and are connected by an operator in between. Addition, subtraction, multiplication, and division are examples of mathematical operators. For example, x + y is an expression in which x and y are terms separated by an addition operator. There are two sorts of expressions in mathematics: numerical expressions, which include simply numbers, and algebraic expressions, which contain both numbers and variables.

e.g. A number is 6 more than half of another number, which is x. In a mathematical expression, this proposition is expressed as x/2 + 6. Complex riddles are solved using mathematical expressions.

Now,

Given expression is   -2x +3+ 7y + 4x -5

writing same terms together

=4x-2x+7y+3-5

=2x+7y-2

hence,

             The expression equivalent to  -2x +3+ 7y + 4x -5 is 2x+7y-2.

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Answer:

Step-by-step explanation:

Let's call the length of the winning jump "w".

Sarah's best jump is 12% more than her first jump, which was 4.25m. So her best jump was 4.25m * 1.12 = 4.77m.

However, her best jump is 15% lower than the winning jump, so we can set up an equation to solve for w:

4.77m * 1.15 = w

Solving for w:

w = 4.77m * 1.15 = 5.51m

So the winning jump was 5.51m.

Aɳʂɯҽɾҽԃ Ⴆყ ɠσԃKEY ꦿ

It is a biased sample.

What is meant by a random sample?

Each sample has an equal chance of being chosen as part of the sampling procedure known as random sampling. A randomly selected sample is intended to be a fair reflection of the entire population.

A random sample is one in which each individual, thing, or event has an equal chance of being chosen. Compared to other types of samples, a random sample has a higher likelihood of being representative of the total population. A skewed sample is one that does not fairly represent the population as a whole.

Here Dorthy considered only the first 20 people and not the whole population so this is not a random sample and it is a biased sample.

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Answer: $212,019 to raise a child from birth to 17 years in a household with an annual income of $64,000.

Explanation:

To find out the total cost of raising a child in a household with an annual income of $64,000, we can plug in x = 64,000 into the equation y = 1.55x + 110,419:

y = 1.55x + 110,419

y = 1.55 * 64,000 + 110,419

y = 101,600 + 110,419

y = $212,019

So, it would approximately cost $212,019 to raise a child from birth to 17 years in a household with an annual income of $64,000.

Susan predicts that private school pupils will perform better than the general populace. The best description for this type of test is a right-tailed test.

In this scenario, Susan is testing the hypothesis that the mean score of the students of the private school is greater than 572, which is the mean score of the general population. This type of test, where the alternative hypothesis is "greater than" a specified value, is known as a right-tailed test or a one-tailed test (since the test is only considering one direction of deviation from the null hypothesis).

So the correct answer is d) a right-tailed test or a one-tailed test.

The complete question is:-

Susan hypothesizes that the students of a private school will score higher than the general population. Susan records a sample mean equal to 578 and states the hypothesis as μ= 572 vs μ>572. Select the best description for this type of test. a.) lower-tailed test b.) left-tailed test c.) two-tailed test d.) right-tailed test.

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The sum of the 10th terms of the geometric progression is 1023

The sum of the terms of a geometric progression (GP) is a formula used to find the total of a series of numbers that are increasing or decreasing by a common ratio. A geometric progression is a sequence of numbers such that the ratio of any two consecutive terms is constant.

The formula for the sum of the n terms of a geometric progression with first term a and common ratio r is given by:

Sₙ = a(rⁿ - 1) / r - 1

where:

a is the first term of the progression

r is the common ratio

n is the number of terms in the progression

In the problem given;

a = 1, n = 10, r = 2

Using the formula above;

Sₙ = a(rⁿ - 1) / r - 1

Substituting the values into the formula

S₁₀ = 1(2¹⁰ - 1) / 2 - 1

S₁₀ = 1023

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After 3 years the rate of simple interest charged at this to Chloe bank is  7%

We can start by using the formula for simple interest:

Simple Interest = Principal * Rate * Time

where the principal is the amount borrowed, the rate is the interest rate as a decimal, and the time is the duration of the loan in years.

Plugging in the given values, we get:

168 = 800 * Rate * 3

Solving for the rate, we get:

Rate = 168 / (800 * 3) = 0.07

Hence,

The rate of simple interest charged at this bank is 0.07, or 7% as a percentage.

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Answer:

i think this the answer

Step-by-step explanation:

26×14=ans

20×14+6×14=the same answer

10×26+4×26=same answer