3 years ago

When John bought his new computer, he purchased an online computer help. Service.

Mathematics

2 answers:

Hatshy [7]3 years ago

4 0

Answer:

The answer I believe is 15?? not sure, but I tried

Step-by-step explanation:

all I did was subtract.- 25.50 minus 10.50

olga55 [171]3 years ago

3 0

he can use 4 sessions

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A square has side length of 9 in. If the area is doubled, what happens to the side length?

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Answer:

The side length is multiplied by $\sqrt{2}$

Step-by-step explanation:

we know that

The area of the original square is equal to

$A=9^{2}=81\ in^{2}$

If the area is doubled

then

The area of the larger square is

$A1=(2)81=162\ in^{2}$

Remember that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z ----> the scale factor

x ----> the area of the larger square

y ---> the area of the original square

$z^{2}=\frac{x}{y}$

we have

$x=162\ in\^{2}$

$y=81\ in\^{2}$

$z^{2}=\frac{162}{81}$

$z^{2}=2$

$z=\sqrt{2}$ ------> scale factor

therefore

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Step-by-step explanation:

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