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9 July, 15:11

The width of a rectangle is 7 inches shorter than its length. The area is 78 square inches. What are the dimensions of the rectangle?

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  1. 9 July, 15:36
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    Step-by-step explanation:W = L - 7

    WL = 78

    (L-7) L = 78

    L^2 - 7L - 78 = 0

    Factorize: (L-13) (L+6) = 0

    L = 13 or - 6

    A length cannot be negative, so the length must be 13 miles.

    The width is 13-7 = 6 miles.
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