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March 29, 2017

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a rectangular mosaic is made up of exactly 12 square tiles that have an area of 9 square inches each. If the width of the mosaic is 9 inches, what is the perimeter of the mosaic in inches

  • math - ,

    Each tile is 3 by 3 inches

    The width of the mosaic is 3 tiles. The length must be 4 tiles = 12 inches

    P = 2L + 2W

    P = 2(12) + 2(9)

    P = 24 + 18

    P = 42 inches

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