document.write( "Question 178780: A bicycle rider travels 18 miles in the same amount of time that it takes a jogger to travel 10 miles. If the bicyclist goes 9.6 miles per hour faster than the jogger, how fast does each person travel? \n" ); document.write( "
Algebra.Com's Answer #133767 by Mathtut(3670)![]() ![]() ![]() You can put this solution on YOUR website! A bicycle rider travels 18 miles in the same amount of time that it takes a jogger to travel 10 miles. If the bicyclist goes 9.6 miles per hour faster than the jogger, how fast does each person travel? \n" ); document.write( ": \n" ); document.write( "distance = rate * time \n" ); document.write( ": \n" ); document.write( "let r be the rate of the jogger...therefore rate of the bike rider is r+9.6 \n" ); document.write( "times are equal \n" ); document.write( ": \n" ); document.write( "bike:18=(r+9.6)t...eq 1 \n" ); document.write( "jogger:10=rt.......eq 2 \n" ); document.write( ": \n" ); document.write( "rewrite eq 2 to t=10/r and plug that into eq 1 \n" ); document.write( ": \n" ); document.write( "18=(r+9.6)(10/r) \n" ); document.write( ": \n" ); document.write( "18r=10(r+9.6)......multiplied both sides by r \n" ); document.write( ": \n" ); document.write( "18r=10r+96 \n" ); document.write( ": \n" ); document.write( "8r=96 \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( " |