document.write( "Question 314609: The length of a rectangle is five more than twice the width. If the perimeter is 70 feet, find the length? \n" ); document.write( "
Algebra.Com's Answer #224969 by texttutoring(324) You can put this solution on YOUR website! Let l=length and w=width\r \n" ); document.write( "\n" ); document.write( "The formula for perimeter is P=2l+2w and we know that l=2w+5\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "70=2l+2w\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now replace the l with 2w+5\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "70=2(2w+5) + 2w \n" ); document.write( "70=4w+10+2w \n" ); document.write( "70=6w+10 \n" ); document.write( "60=6w \n" ); document.write( "w=10\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "l=2w+5 \n" ); document.write( "l=2(10)+5 \n" ); document.write( "l=25\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So the width is 10, and the length is 25. \n" ); document.write( " |