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posted by sha on Monday, January 24, 2011 at 10:32pm.

the perimeter of a rectangular floor mat is 42 inches, if the width is 9 inches, what is the length?

P = 2L + 2W 42 = 2L + (2 * 9) 42 = 2L + 18 24 = 2L 24/2 = L ? = L

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