document.write( "Question 372170: \"Please help me with this problem\" From a common starting position,willy and jessica ride their bikes in opposite directions. willy ride 2 km faster than jessica. in 3 hours, the two are 60 km apart. find the average speed of each one. \n" ); document.write( "
Algebra.Com's Answer #265140 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! From a common starting position, willy and jessica ride their bikes in opposite directions. Willy rides 2 km faster than jessica. in 3 hours, the two are 60 km apart. find the average speed of each one. \n" ); document.write( "Let jessica's rate be x km/h \n" ); document.write( "Then willy's rate is x+2 km/h \n" ); document.write( "------ \n" ); document.write( "They are separating at a combined rate of 2x+2 km/h \n" ); document.write( "------ \n" ); document.write( "Equation: \n" ); document.write( "time*rate = distance \n" ); document.write( "3*(2x+2) = 60 \n" ); document.write( "2x+2 = 20 \n" ); document.write( "2x = 18 \n" ); document.write( "x = 9 km/h (Jessica's rate) \n" ); document.write( "x+2 = 11 km/h (Willy's rate) \n" ); document.write( "================================ \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |