document.write( "Question 143290: The area of a rectangular parcel of land is 720 square meters. The length of the land is 4 meters less than twice the width.
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document.write( "A. Write an equation that can be used to find the dimensions of the land.
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document.write( "B. Solve the equation written in part A to find the dimensions of the land.
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Algebra.Com's Answer #104282 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! AREA=L*W \n" ); document.write( "A) 720=(2W-4)W \n" ); document.write( "B) 720=2W^2-4W \n" ); document.write( "2W^2-4W-720=0 \n" ); document.write( "2(W^2-2W-360)=0 \n" ); document.write( "2(W-20)(W+18)=0 \n" ); document.write( "W-20=0 \n" ); document.write( "W=20 FOR THE WIDTH. \n" ); document.write( "L=2*20-4 \n" ); document.write( "L=40-4 \n" ); document.write( "L=36 FOR THE LENGTH. \n" ); document.write( "PROOF: \n" ); document.write( "20*36=720 \n" ); document.write( "720=720\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |