document.write( "Question 899068: Jenny, who rides a moped, takes 2 hours less to travel 60 miles than Maureen takes to travel 50 miles on her bicycle. Jenny travels 10 miles per hour faster than Maureen. (Hint: speed = distance ÷ time.) \n" ); document.write( "
Algebra.Com's Answer #545161 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Jenny, who rides a moped, takes 2 hours less to travel 60 miles than Maureen takes to travel 50 miles on her bicycle. Jenny travels 10 miles per hour faster than Maureen. (Hint: speed = distance ÷ time.) \n" ); document.write( "------- \n" ); document.write( "Jenny DATA: \n" ); document.write( "distance = 60 miles ; time = x-2 hrs ; rate = d/t = 60/(x-2) mph \n" ); document.write( "------- \n" ); document.write( "Maureen DATA: \n" ); document.write( "distance = 50 miles ; time = x hrs ; rate = 50/x mph \n" ); document.write( "--------------------- \n" ); document.write( "Equation: \n" ); document.write( "rate - rate = 10 mph \n" ); document.write( "60/(x-2) - 50/x = 10 mph \n" ); document.write( "----- \n" ); document.write( "60x - 50(x-2) = 10x(x-2) \n" ); document.write( "----------------------- \n" ); document.write( "10x + 100 = 10x^2 -20x \n" ); document.write( "10x^2 -30x - 100 = 0 \n" ); document.write( "x^2 - 3x - 10 = 0 \n" ); document.write( "(x-5)(x+2) = 0 \n" ); document.write( "Positive solution:: \n" ); document.write( "x = 5 \n" ); document.write( "--------------------- \n" ); document.write( "Maureen DATA: time = x = 5 hrs ; rate = 50/5 = 10 mph \n" ); document.write( "Jenny DATA: time = x-2 = 3 hrs ; rate = 60/3 = 20 mph \n" ); document.write( "=========================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |