a rectangle has a width of 3 cm + r and a length of 9 cm + 2r. What is the perimeter of the recangle? Thanks
asked Apr 14, 2013 in Algebra 1 Answers by anonymous

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The perimeter is twice the sum of length and width=2(9+2r + 3+r)=2(12+3r)=24+6r or 6(4+r).
answered Dec 30, 2014 by Rod Top Rated User (571,080 points)

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