document.write( "Question 414433: Brenda and her husband Randy bicycled cross-country together. One morning, Brenda rode 30 miles. By traveling only 5 miles per hour faster and putting in one more hour, Randy covered twice the distance Brenda covered. What was the speed of each cyclist. \n" ); document.write( "
Algebra.Com's Answer #290680 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Brenda and her husband Randy bicycled cross-country together. One morning, Brenda rode 30 miles. By traveling only 5 miles per hour faster and putting in one more hour, Randy covered twice the distance Brenda covered. What was the speed of each cyclist. \n" ); document.write( "----------------------------------- \n" ); document.write( "Brenda DATA: \n" ); document.write( "distance = 30 miles ; rate = x mph ; time = 30/x hrs \n" ); document.write( "--------- \n" ); document.write( "New DATA \n" ); document.write( "Randy DATA: \n" ); document.write( "distance = 60 miles ; rate = (x+5) mph ; time = 60/(x+5) hrs \n" ); document.write( "---- \n" ); document.write( "Equation: \n" ); document.write( "Brenda time - Randy time = 1 hr. \n" ); document.write( "30/x - 60/(x+5) = 1 \n" ); document.write( "---- \n" ); document.write( "30(x+5) - 60x = x(x+5) \n" ); document.write( "30x+150 - 60x = x^2+5x \n" ); document.write( "--- \n" ); document.write( "x^2+35x-150 = 0 \n" ); document.write( "Use the Quadratic Formula to get x = 3.86 mph (Brenda's rate) \n" ); document.write( "x+5 = 8.86 mph (Randy's rate) \n" ); document.write( "================================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "=========== \n" ); document.write( " |