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22 September, 13:23

The perimeter of a rectangle is 15x + 17 y if the length is 7/2x + 7y then find the width of the rectangle A) 4x + 3/2y B) 8x + 3y C) 8x + 10y D) 4x + 3y

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  1. 22 September, 13:44
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    The equation for the perimeter of a rectangle:

    P = 2L + 2W

    We're given P and L and asked to find W:

    15x + 17y = 2 (7/2x + 7y) + 2W

    15x + 17y = 7x + 14y + 2W

    2W = 8x + 3y

    W = 4x + 3/2y

    Answer is A.
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