document.write( "Question 1074845: The area of a rectangular red sticker is 98 square millimeters. The perimeter is 42 millimeters. What are the dimensions of the sticker?
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Algebra.Com's Answer #689505 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! A=L*W=98 \n" ); document.write( "Therefore L=98/W. \n" ); document.write( "Perimeter is 42 mm and half the perimeter is L+W=21 mm \n" ); document.write( "But L=98/W \n" ); document.write( "Therefore (98/W)+W=21 mm \n" ); document.write( "multiply everything by W \n" ); document.write( "98+w^2=21W \n" ); document.write( "w^2-21w+98=0 \n" ); document.write( "(w-14)(w-7)=0 \n" ); document.write( "w=14 or 7 \n" ); document.write( "L=7 or 14 \n" ); document.write( "By convention, L is longer, so the dimensions are 14 mm x 7 mm. \n" ); document.write( " |