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13 September, 23:59

Margot is sewing a ribbon on a seam along the perimeter of a square pillow. The side length of the pillow is 2x2 + 1 inches, and its perimeter is 4 (2x2 + 1) inches. If x = 3.5, how much ribbon does she need?

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  1. 14 September, 01:59
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    Given:

    side length = 2x² + 1

    perimeter = 4 (2x² + 1)

    perimeter = 8x² + 4

    x = 3.5

    perimeter = 8 (3.5²) + 4

    p = 8 (12.25) + 4

    p = 98 + 4

    p = 102 inches

    She need 102 inches of ribbon.
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