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26 October, 21:53

A flat rectangular piece of aluminum has a perimeter of 70 inches. The length is 11 inches longer than the width. Find the width. A. 34 inches B. 35 inches C. 23 inches D. 12 inches

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  1. 26 October, 22:08
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    perimeter = 2L + 2w

    L = w+11

    70 = 2 (w+11) + 2w

    70 = 2w+22+2w

    70 = 4w + 22

    48 = 4w

    w=48/4 = 12

    width = 12

    length = 12+11 = 23

    2x12 = 24

    2x23 = 46

    46+24 = 40

    length = 23 inches, width = 12 inches

    Answer is D
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