document.write( "Question 335315: a rectangle is 3 times as long as it is wide. the perimeter is 60 cm. find the dimensions of the rectangle. round to the nearest tenth if necessary \n" ); document.write( "
Algebra.Com's Answer #240360 by Jeannie1012(8)![]() ![]() You can put this solution on YOUR website! The formula for finding out the perimeter of a rectangle is 2L+2w= perimeter \n" ); document.write( "In this problem we are told that the perimiter is = to 60 and that the length is 3 times as long as the width. So L =2(3w) \n" ); document.write( " your equation is 2(3w)+2w=60 \n" ); document.write( " use distribution to solve the 2(3w) and get 6w+2w=60 \n" ); document.write( "combine like terms 8w=60 \n" ); document.write( "divide both sides by 8 to get w alone 8w divided by 8 is w and 60 divided by 8 is 7.5 so w= 7.5\r \n" ); document.write( "\n" ); document.write( "now that you know w is = to 7.5 and you know that the lenth is 3 times long you mulitply 7.5 by three and get 22.5 \n" ); document.write( "w=7.5 \n" ); document.write( "L=22.5\r \n" ); document.write( "\n" ); document.write( "to check plug the numbers back in 2(7.5) + 2(22.5) = 60? 15+ 45 = 60 since it checks its correct. \n" ); document.write( " \n" ); document.write( " |