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4 years ago

6

Can you help me with this problem.

1 answer:

antoniya [11.8K]4 years ago

4 0

I think it’s -1/20

= -7/20 + -1/20

= -8/20

You divide the denominator by 4 to get 5 since 4 x 5 = 20.

The unknown numerator has to be divided by 4 to get 2. Therefore, 8 divided by 4 is 2.

And the sign will stay the same because they are the same and it’s addition.

-7/20 + -1/20 = -8/20 = -2/5

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mars1129 [50]

ANSWER

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EXPLANATION

The cost per student varies inversely as the number of students.

Inverse proportion is written as:

$\begin{gathered} y\propto\frac{1}{x} \\ y=\frac{k}{x} \\ \text{where k = constant of proportionality} \end{gathered}$

Let the cost per student be y.

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If the cost is down to $200, it means that y is now $200.

That is:

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