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2 years ago

PLEASE HELP ASAP PLEASE

Mathematics

1 answer:

Juliette [100K]2 years ago

3 0

Answer: #20, x = 3

#21, x = 1/2

Step-by-step explanation:

#20) x + 4 + x + 2+ x + 5 = x + 3 +x+3+x+1+x+1

3x + 11 = 4x + 8

-3x -3x

11= x + 8

- 8 - 8

3 = x

#21) 12x(5) = 6x + 9 + x + 10 + x + 7

60x =8x + 26

-8x -8x

52x = 26

divide both sides by 52

x = 1/2

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Below are the jersey numbers of 11 players randomly selected from a football team. Find the range, variance, and standard deviat

Aleksandr-060686 [28]

Answer:

Range = 71

Variance = 546.0

Standard Deviation = 23.4

Option A) Jersey numbers are nominal data that are just replacements for names, so the resulting statistics are meaningless.

Step-by-step explanation:

We are given the following data set in the question:

33, 29, 97, 56, 26, 78, 83, 74, 65, 47, 58

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

$\text{Variance} = \displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{646}{11} = 58.7$

Sum of squares of differences = 5460.18

$\text{Variance} = \frac{5460.18}{11} = 546.0$

$S.D = \sqrt{\frac{5460.18}{10}} = 23.4$

Sorted Data Set: 26, 29, 33, 47, 56, 58, 65, 74, 78, 83, 97

Range = Maximum - Minimum

Range = 97 - 26 = 71

Based on the values, we can say that

Option A) Jersey numbers are nominal data that are just replacements for names, so the resulting statistics are meaningless.

6 0

3 years ago

Please answer the question stated below:

iogann1982 [59]

Y+57=267
Y=267-57
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3 years ago

At an end of the year sale, Gabriela bought more than 12 bottles of hand soaps and lotions. If x represents the number of hand s

kolezko [41]

B.) x + y > 12 should be the answer.

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3 years ago

Read 2 more answers

Anne’s marginal income tax rate is 32 percent. She purchases a corporate bond for $10,000 and the maturity, or face value, of th

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Answer:

Anne’s after-tax rate of return from the corporate bond is 3.5% or 5% x (1-.3). Because interest from the bond is taxed annually and her rate is assumed to be constant, the after-tax rate of return doesn’t depend on her investment horizon. Thus, her annual after-tax rate of return remains at 3.5% if the bond matures in ten years.

Step-by-step explanation:

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3 years ago

3x + 5y = 7 How to solve it

Lubov Fominskaja [6]

Answer:

x=1 and y=4/5

Step-by-step explanation:

Given system of equations

3x+5y=7

5x+10y=13

Multiply first equation by 2

2(3x+5y)=2(7)

6x+10y=14

Eliminate y-variable to get "x"

6x+10y=14

- 5x+10y=13

x = 1

Substitute x=1 into either equation and find "y"

3x+5y=7

3(1)+5y=7

3+5y=7

5y=4

y=4/5

Therefore, x=1 and y=4/5

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2 years ago