document.write( "Question 319074: Joe ran up a path to the top of a hill at an average speed of 2 mph and ran down the same path at an average speed of 8 mph. If Joe ran up and down the hill in 1 hour, what was the total distance that he ran, in miles? \n" ); document.write( "
Algebra.Com's Answer #228488 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! D=RT \n" ); document.write( "D=2T \n" ); document.write( "UP THE HILL. \n" ); document.write( "D=8(1-T) DOWN THE HILL. \n" ); document.write( "2T=8(1-T) \n" ); document.write( "2T=8-8T \n" ); document.write( "2T+8T=8 \n" ); document.write( "10T=8 \n" ); document.write( "T=8/10=.8 HOURS FOR THE RUN UP THE HILL. \n" ); document.write( "1-.8=.2 HOURS FOR THE RUN DOWN THE HILL. \n" ); document.write( "PROOF: \n" ); document.write( "2*.8=8*.2 \n" ); document.write( "1.6=1.6 \n" ); document.write( "1.6+1.6=3.2 MILES IS THE TOTAL DISTANCE UP & DOWN. \n" ); document.write( " \n" ); document.write( " |