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3 years ago

Solve -9/2y = 27/2 for y

Mathematics

1 answer:

slavikrds [6]3 years ago

4 0

Answer: y = -3

I hope this helps you

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What is the midpoint of the line segment with the endpoints J(-9,-4) and K(7,8)?

12345 [234]

Answer:

Step-by-step explanation:

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3 years ago

Divide 3 over 4 ÷ 1 over 8 = ____.

hammer [34]

When you divide two fractions, you actually just flip one over (it's reciprocal) and multiply them.

$\frac{3}{4}$ ÷ $\frac{1}{8}$ Use the recriprocal of $\frac{1}{8}$
<span> $\frac{3}{4}$ ÷ $\frac{8}{1}$ Multiply (3 x 8) and (4 x 1)
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$\frac{24}{4}$ Divide

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<span> $\frac{3}{4}$ ÷ $\frac{1}{8}$ = 6</span>

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3 years ago

A preliminary study of hourly wages paid to unskilled employees in three metropolitan areas was conducted. Included in the sampl

andriy [413]

There is a system glitch during the process of adding my answer here so i create a document file for the answer, you find it in the attachment below.

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5 0

3 years ago

A statistics student would like to estimate the average age of students at her college. She would like to be 99% confident that

agasfer [191]

Answer:

Step-by-step explanation:

Given that a statistics student would like to estimate the average age of students at her college.

Population std dev =2.5years

For 99% , Z critical = ±2.59

Margin of error = $±2.59*\frac{2.5}{\sqrt{n} } \\= \frac{±6.475}{\sqrt{n} } =0.5$

Simplify to get

$\sqrt{n} =12.95$

n = 167.70

n=168

She must survey 168 people

7 0

3 years ago

Whats a+2 over 2=-1 ??

tia_tia [17]

Not sure what exactly you meant, so i solved for both possibilities...

Answer: a=-2

assuming you mean a+2/2=-1.....

a+2/2=-1
simplify..
a+1=-1
subtract 1 from both sides
a=-2
____________________

Answer: a=-4

assuming you mean (a+2)/2=-1...

(a+2)/2=-1
simplify...
a/2+2/2=-1
simplify
a/2+1=-1
subtract 1 from both sides
a/2=-2
multiply both sides by 2
a=-4

8 0

3 years ago