document.write( "Question 44792: Perimeter of a rectangle. The width of a rectangular playground is 2x – 5 ft., and the length is 3x + 9 ft. Write a polynomial P(x) that represents the perimeter and then evaluate this perimeter polynomial if x is 4 ft. \n" ); document.write( "
Algebra.Com's Answer #29666 by bcpm36(2)\"\" \"About 
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P = 2(l + w) l = 3x + 9 ft w = 2x - 5 ft
\n" ); document.write( "P = 2( 3x + 9 + 2x - 5 )
\n" ); document.write( "p = 2 (5x + 4)
\n" ); document.write( "p = 10x + 8\r
\n" ); document.write( "\n" ); document.write( "x = 4\r
\n" ); document.write( "\n" ); document.write( "P = 10(4) + 8
\n" ); document.write( "P = 40 + 8
\n" ); document.write( "P = 48 ft
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