3 years ago

I need help with this question!

1 answer:

6 0

It isn't that hard to choose an answer corresponding to an area of 63 ft^2.

A: 35 ft^2

B: 63 ft^2 . . . . . perhaps this one is the correct choice, eh?

C: 99 ft^2

D: 143 ft^2

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dexar [7]

$\huge\boxed{x=25}$

The mistake is in Step 1. The solver should have also squared $9$ when squaring the other side of the equation.

<h3>Correctly solving</h3>

$\begin{aligned}\sqrt{3x+6}&=9\\(\sqrt{3x+6})^2&=9^2\\3x+6&=81\\3x+6-6&=81-6\\3x&=75\\\frac{3x}{3}&=\frac{75}{3}\\x&=25\end{aligned}$

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Dennis_Churaev [7]

Hey there!

In the equation mentioned,

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