document.write( "Question 245058: suppose that the width of a rectangle is three feet shorter than lenght and that the perimeter of the rectangle is 84 feet.
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document.write( "a.)set up an equation for the perimeter involving only L, the leght of the rectangle.
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document.write( "b.)solce the equation algebraically to find the lenght of the rectangle.find the width as well. \n" );
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Algebra.Com's Answer #179182 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! W=L-3 \n" ); document.write( "2L+2W=84 \n" ); document.write( "2L+2(L-3)=84 \n" ); document.write( "2L+2L-6=84 \n" ); document.write( "4L=84+6 \n" ); document.write( "4L=90 \n" ); document.write( "L=90/4 \n" ); document.write( "L=22.5 ANS. FOR THE LENGTH. \n" ); document.write( "W=22.5-3=19.5 ANS. FOR THE WIDTH. \n" ); document.write( "PROOF: \n" ); document.write( "2*22.5+2*19.5 \n" ); document.write( "45+39=84 \n" ); document.write( "84=84\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |