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September 15, 2014

September 15, 2014

Posted by **Unknown** on Saturday, November 16, 2013 at 8:19pm.

Write an expression for the length of the rectangle in terms of W.

Write a simplified expression for the perimeter of the rectangle in terms of W.

Find the perimeter of the rectangle if the width is 3 inches.

- Math -
**John**, Saturday, November 16, 2013 at 9:02pmWell W = 3

L = (2W)-5 = (6) - 5 = 1

so

W + W + L + L = perimeter

so 2W + 2L = perimeter

so subbing 2W-5 in for L we get

2W + 2(2W-5) = perimeter

= 2W + 4W-10 = perimeter

= 6W - 10 = perimeter

= 6(3) - 10 = perimeter

=18 - 10 = perimeter

= 8 = perimeter

or solving the other way L = 1 W = 3

2W + 2L = 6 + 2 = 8 = perimeter

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