document.write( "Question 884133: suppose you have entered a 62 mile biathlon that consist of a run and a bicycle race. during your run your average velocity is 8mph and during your bicycle race your average velocity is 20mph. you finished the race in 4 hrs. what is the distance of the run? \n" ); document.write( "
Algebra.Com's Answer #534014 by lwsshak3(11628)\"\" \"About 
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uppose you have entered a 62 mile biathlon that consist of a run and a bicycle race. during your run your average velocity is 8mph and during your bicycle race your average velocity is 20mph. you finished the race in 4 hrs. what is the distance of the run?
\n" ); document.write( "***
\n" ); document.write( "let x=travel time of running race
\n" ); document.write( "4-x=travel time of bicycle race
\n" ); document.write( "distance=speed*travel time
\n" ); document.write( "..
\n" ); document.write( "8x+20(4-x)=62
\n" ); document.write( "8x+80-20x=62
\n" ); document.write( "12x=18
\n" ); document.write( "x=3/2
\n" ); document.write( "8x=12
\n" ); document.write( "distance of the run=12 miles
\n" ); document.write( "
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