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2 years ago

7

I think of a number, subtract 2 and multiply it by 5. this gives me the same answer as when I take 7 from the number and treble

it. what is much number?

1 answer:

Darya [45]2 years ago

8 0

30...? i have no idea

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Frank wants to build a 48 feet long fence around his garden. How long will be the fence in yards?

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Step-by-step explanation:

<u>Method 1</u>

Apply Difference of Two Squares Formula: $a^2-b^2=(a+b)(a-b)$

Given $x^2-16=0$

Rewrite 16 as 4²

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$\implies a = \sqrt{x^2}=x$

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<u>Method 2</u>

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Add 16 to both sides:

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