document.write( "Question 264958: Fifteen minutes after a boy left for school on his bike, his mother noticed that he left his term paper on the kitchen table. His mother left home, driving at a rate of 32 mph, to catch up to him. If he had been bicycling at a rate of 8 mph, how long did it take his mother to catch up with him? \n" ); document.write( "
Algebra.Com's Answer #194991 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Fifteen minutes after a boy left for school on his bike, his mother noticed that he left his term paper on the kitchen table. His mother left home, driving at a rate of 32 mph, to catch up to him. \n" ); document.write( " If he had been bicycling at a rate of 8 mph, how long did it take his mother to catch up with him? \n" ); document.write( ": \n" ); document.write( "Change 15 min to .25 hrs \n" ); document.write( ": \n" ); document.write( "Let t = travel time of the mother \n" ); document.write( "then \n" ); document.write( "(t+.25) = travel time of the boy \n" ); document.write( ": \n" ); document.write( "When Mom catches boy they will have traveled the same distance, \n" ); document.write( "write a distance equation Dist = speed * time \n" ); document.write( ": \n" ); document.write( "Mom's dist = boy's dist \n" ); document.write( "32t = 8(t+.25) \n" ); document.write( "32t = 8t + 2 \n" ); document.write( "32t - 8t = 2 \n" ); document.write( "24t = 2 \n" ); document.write( "t = \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Check solution by finding the dist each traveled (boy's travel time 15 + 5 = 20 min) \n" ); document.write( "5/60(32) = 2.67 mi \n" ); document.write( "20/60(8) = 2.67 mi \n" ); document.write( " |