document.write( "Question 482696: On Jerry's way to work in the morning, he was only able to travel at a rate of 20 mph because of traffic. On his drive home, he averaged 40mph. If his total time was 1 1/2 hours, how long did it take him to drive to work? \n" ); document.write( "
Algebra.Com's Answer #330384 by cleomenius(959)![]() ![]() You can put this solution on YOUR website! I would set this up in the following manner with two equations: \n" ); document.write( "rate*time = rate*rime\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "20x = 40y \n" ); document.write( "x + y = 1.5; \n" ); document.write( "y = 1.5 - x\r \n" ); document.write( "\n" ); document.write( "Then substitute equation two into equation one. \n" ); document.write( "20x = 40(1.5- x) \n" ); document.write( "20x = 60 - 40x \n" ); document.write( "60x = 60 \n" ); document.write( "x = 1 \n" ); document.write( "y therefore comes out to .5 \n" ); document.write( "Cleomenius.\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |