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2 years ago

-7/3y-2/9=1/3 solve for y

Mathematics

1 answer:

uranmaximum [27]2 years ago

4 0

Answer:

y = -12

Step-by-step explanation:

-7/3y - 2/9 = 1/3

cross multiple for 1/3:

-21/3y - 6/9 = 1

cross multiply for 3y and 9:

-21 - 6 = 3y + 9

3y + 9 = -27

3y = -36

y = -12

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Read 2 more answers

are any two regular polygons similar. The area of the smaller figure is about 390 cm^2. choose the best estimate of the area of

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Answer:

The best estimate of the area of the larger figure is $693\ cm^{2}$

Step-by-step explanation:

step 1

<em>Find the scale factor</em>

we know that

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

Let

z----> the scale factor

x-----> the corresponding side of the larger figure

y-----> the corresponding side of the smaller figure

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

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substitute

$z=\frac{12}{9}=\frac{4}{3}$ -----> the scale factor

step 2

<em>Find the area of the larger figure</em>

we know 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 figure

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

we have

$z=\frac{4}{3}$

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substitute and solve for x

$(\frac{4}{3})^{2}=\frac{x}{390}$

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