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3 years ago

How should I do this

Mathematics

1 answer:

Black_prince [1.1K]3 years ago

4 0

I have no clue sorry:(

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X⋅x⋅x⋅x⋅x⋅(−3)⋅(−3)⋅(−3)

poizon [28]

Answer:

Hey mate, please describe your question perfectly.

6 0

3 years ago

Read 2 more answers

Solve the inequality <br> r/6 < or equal to 3

RSB [31]

R is greater then or equal to18

6 0

3 years ago

In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the fol

Julli [10]

Answer:

$0.071,1.928$

Step-by-step explanation:

Downtown Store North Mall Store

Sample size n 25 20

Sample mean $\bar{x}$ $9 $8

Sample standard deviation s $2 $1

$n_1=25\\n_2=20$

$\bar{x_1}=9\\ \bar{x_2}=8$

$s_1=2\\s_2=1$

$x_1-x_2=9-8=1$

Standard error of difference of means = $\sqrt{\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}}$

Standard error of difference of means = $\sqrt{\frac{2^2}{25}+\frac{1^2}{20}}$

Standard error of difference of means = $0.458$

Degree of freedom = $\frac{\sqrt{(\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}})^2}{\frac{(\frac{s_1^2}{n_1})^2}{n_1-1}+\frac{(\frac{s_2^2}{n_2})^2}{n_2-1}}$

Degree of freedom = $\frac{\sqrt{(\frac{2^2}{25}+\frac{1^2}{20}})^2}{\frac{(\frac{2^2}{25})^2}{25-1}+\frac{(\frac{1^2}{20})^2}{20-1}}$

Degree of freedom =36

So, z value at 95% confidence interval and 36 degree of freedom = 2.0280

Confidence interval = $(x_1-x_2)-z \times SE(x_1-x_2),(x_1-x_2)+z \times SE(x_1-x_2)$

Confidence interval = $1-(2.0280)\times 0.458,1+(2.0280)\times 0.458$

Confidence interval = $0.071,1.928$

Hence Option A is true

Confidence interval is $0.071,1.928$

4 0

3 years ago

And outdoor deck is 7 feet wide. The perimeter of the deck is 64 feet. What is the length of the deck?

vova2212 [387]

Well perimeter is lengthx2 and widthx2 so 7x2=14
then 64-14=50
50÷2= 25

length=25

4 0

3 years ago

Find an equation of the line: through the point (2, −4) with a y-intercept of −2. PLEASE HELP ONLY HAVE 20 MINUTES

Ber [7]

Answer:

Y=-x-2 or Y=-1x-2

Step-by-step explanation:

5 0

4 years ago