document.write( "Question 319197: Perimeter of a rectangle.The width of a rectangular playground is 2x -5 feet, and the length is 3x + 9 feet. Write a polynomial P(x) that represents the perimeter and then evaluate this perimeter polynomial if x is 4 feet. \n" ); document.write( "
Algebra.Com's Answer #228543 by jim_thompson5910(35256)\"\" \"About 
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Perimeter: \"P=2L%2B2W=2%283x%2B9%29%2B2%282x-5%29=6x%2B18%2B4x-10=10x%2B8\"\r
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\n" ); document.write( "\n" ); document.write( "So the perimeter is \"P=10x%2B8\". Now just plug in x=4 and evaluate.
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