document.write( "Question 406816: Two runners leave from the same location traveling in opposite directions. The first runner is running at 7 mph and the second is running at 9 mph. How long have they been running when they are 24 miles apart? \n" ); document.write( "

Algebra.Com's Answer #286980 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Two runners leave from the same location traveling in opposite directions. 
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document.write( "The first runner is running at 7 mph and the second is running at 9 mph. 
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document.write( "How long have they been running when they are 24 miles apart? 
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document.write( "Let x and (24-x) represent the Distance ran at 7mph and 9mph repectively
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document.write( "Question states*** (Note: d = r*t or t = D/r)
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document.write( "  
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document.write( "Solving for x by cross multiplying
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document.write( " 9x = 7(24-x)
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document.write( "  16x = 168
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document.write( "    x = 10.5mi, distance ran by 7mph runner
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document.write( "Time = 10.5mi/7mph = 1.5hr,the time they have been running
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document.write( "CHECKING our Answer***
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document.write( "  7mph*1.5hr + 9mph*1.5hr = 10.5mi + 13.5mi = 24mi \n" );
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