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12 December, 18:54

A rectangle has a length of 3x inches. The width of the rectangle is (2x+6) inches more than the length. A) Find the perimeter of the rectangle in terms of X. B) If x=3, find the perimeter of the rectangle.

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  1. 12 December, 21:56
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    Perimeter = 2 * (length + width)

    perimeter = 2 * (3x + (3x + (2x+6)))

    ... = 2 * (3x + 3x + 2x + 6)

    ... = 2 * (8x + 6)

    perimeter = 16x + 12

    If x=3, the perimeter is 16*3 + 12 = 60 inches.
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