27-05-2017
Mathematics

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The answer to what is on the picture

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27-05-2017

Area of a Rectangle = L x W = 66 yd²

L = 3W - 7 (given)==> L x W = (3W-7) (W)= 3W² -7 W ==>

3W² - 7W = 66==> 3W² - 7W -66 =0

Solving this quadratic equation gives W'= 6 and W" = -11/3 (unacceptable)

So W = 6 yd and L = 11 yd

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