document.write( "Question 120777: Debbie has 80 metres of fencing to make a rectangular dog pound of dimensions length ,L,and width, W. What is the equation of the area of the dog pound as a function of length? \n" ); document.write( "
Algebra.Com's Answer #88553 by rapaljer(4671)\"\" \"About 
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Perimeter = 2W + 2L = 80, so divide both sides by 2:
\n" ); document.write( "W+L = 40
\n" ); document.write( "W= 40-L\r
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\n" ); document.write( "\n" ); document.write( "Area = LW
\n" ); document.write( "Area = L(40-L)
\n" ); document.write( "Area = \"40L+-L%5E2\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "R^2
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