document.write( "Question 543599: a rectangle has the length that is two thirds its width. If the perimeter of the rectangle is 40 meters, what is the length of the rectangle? \n" ); document.write( "
Algebra.Com's Answer #354895 by lmeeks54(111)![]() ![]() You can put this solution on YOUR website! Let L = the length \n" ); document.write( "Let W = the width \n" ); document.write( "Let P = the perimeter \n" ); document.write( "... \n" ); document.write( "The formula for the perimeter of a rectangle is P = 2L + 2W \n" ); document.write( "... \n" ); document.write( "Given: \n" ); document.write( "P = 40 meters \n" ); document.write( "L = 2/3W \n" ); document.write( "... \n" ); document.write( "Let's substitute the values for P and L into our formula for the perimeter and solve for W. After that, we can solve for L. \n" ); document.write( "... \n" ); document.write( "P = 2L + 2W = 40 m \n" ); document.write( "2(2/3W) + 2W = 40 \n" ); document.write( "4/3W + 2W = 40 \n" ); document.write( "10/3W = 40 \n" ); document.write( "... \n" ); document.write( "Multiply both sides by 3/10: \n" ); document.write( "10/3W(3/10) = 40(3/10) \n" ); document.write( "W = 12 m \n" ); document.write( "... \n" ); document.write( "L = 2/3W \n" ); document.write( "L = 2/3(12) \n" ); document.write( "L = 8 m \n" ); document.write( ".... \n" ); document.write( "The answer to the question is L = 8 meters; however, it is best to always check your work. \n" ); document.write( "... \n" ); document.write( "P = 40 = 2(8) + 2(12) \n" ); document.write( "40 = 16 + 24 \n" ); document.write( "40 = 40 checks \n" ); document.write( "... \n" ); document.write( "cheers, \n" ); document.write( "Lee \n" ); document.write( " |