document.write( "Question 99972: In a walkathon to raise money for charity, Elisa walked a certain distance at 5 mi/h and then jogged twice that distance at 8 mi/h. Her total time walking and jogging was 2 h and 15 min. How many miles long was the walkathon? \n" ); document.write( "
Algebra.Com's Answer #72809 by fastblue(13)![]() ![]() ![]() You can put this solution on YOUR website! The problem says she went twice as far jogging as she did walking so: \n" ); document.write( "2*5*t=8*(2.25-t), where t is for time. Solving this equation tells you \n" ); document.write( "how long she did both, then substitute back in for each speed to get total distance. \n" ); document.write( "so 10t=18-8t, and 18t=18, so t=1 hour. \n" ); document.write( "so (5*1)+(8*1.25)= total distance traveled = 15 miles which is the length of the walkathon. \n" ); document.write( " |