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I need help please I don’t understand it at all

I need help please I don’t understand it at all-example-1

1 Answer

7 votes

Explanation:

Blue portion is a rectangle:


\therefore \: perimeter \: \\ = 2(5x + 5) + 2(3x - 7) \\ = 10x + 10 + 6x - 14 \\ = 16x - 4

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