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8 November, 22:44

The length of a rectangular suitcase is 7 inches longer than the width. the area of the suitcase is 144 squared inches.

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  1. 8 November, 23:56
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    A = LW

    A = 144

    L = W + 7

    144 = W (W + 7)

    144 = W^2 + 7W

    W^2 + 7W - 144 = 0

    (W - 9) (W + 16) = 0

    W - 9 = 0

    W = 9

    W + 16 = 0

    W = - 16 ... this is an extraneous solution and will not work

    So W = 9

    L = W + 7

    L = 9 + 7

    L = 16

    so ur dimensions are : Length = 16 in. and Width = 9 in ... and area = (9 * 16) = 144 in^2
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