document.write( "Question 356844: Dan drives 300 miles to attend college on the drive back home his average speed decreases by 10 miles per hour..\r
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\n" ); document.write( "\n" ); document.write( "write an equation that gives the total driving time t ( in hours ) as a function of average speed r ( in miles per hour ) when driving to college .. \r
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\n" ); document.write( "\n" ); document.write( "then it says \r
\n" ); document.write( "\n" ); document.write( "find the total driving time if he drives to college at an average speed of 60 miles per hour..
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Algebra.Com's Answer #254759 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "distance = rate*time or time = distance/rate
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document.write( "*Let T be the total driving time to and from college
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document.write( "T= 300/r + 300/(r-10)
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document.write( ".
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document.write( "traveling to college at an average speed of 60 miles per hour.. 
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document.write( "T = 300/60 + 300/50
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document.write( "T = 5 + 6
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document.write( "T = 11 hrs \n" );
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