document.write( "Question 518978: A RECTANGLE HAS AN AREA OF 18 M2 AMD A PERIMETER OF 18 M. WHAT ARE IT LENGTH AND WIDTH? \n" ); document.write( "
Algebra.Com's Answer #345317 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! A RECTANGLE HAS AN AREA OF 18 M^2 AMD A PERIMETER OF 18 M. WHAT ARE IT LENGTH AND WIDTH? \n" ); document.write( "--- \n" ); document.write( "Area = (length)(width) = M^2 \n" ); document.write( "Perimeter = 2(length+width) = 18M \n" ); document.write( "----- \n" ); document.write( "L+W = 9M \n" ); document.write( "L = 9M-W \n" ); document.write( "---- \n" ); document.write( "Area = (9M-W)W = M^2 \n" ); document.write( "9MW-W^2 = M^2 \n" ); document.write( "--- \n" ); document.write( "w^2 -9mw+m^2 = 0 \n" ); document.write( "--- \n" ); document.write( "w = [9m +- sqrt(81m^2-4m^2)]/2 \n" ); document.write( "--- \n" ); document.write( "w = [9m +- sqrt(77m^2)]/2 \n" ); document.write( "--- \n" ); document.write( "w = (9/2)m + m*sqrt(77)/2 \n" ); document.write( "--- \n" ); document.write( "w = [9+sqrt(77)](m/2) \n" ); document.write( "---- \n" ); document.write( "I'll leave solution of \"L\" to you. \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |