document.write( "Question 1131522: Noah makes a round trip commute to work each day by car. His trip in the morning is quicker because he leaves before traffic gets bad, so his speed is 15 miles per hour faster in the morning which makes his 8 mile commute take 30 minutes less time on the way home when traffic is bad and he drives more slowly.
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Algebra.Com's Answer #748192 by josgarithmetic(39617) $\"\"$ $\"About$

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\n" ); document.write( "..., 15 miles per hour faster in the morning which makes his 8 mile commute take 30 minutes $\"cross%28less%29\"$ MORE time on the way home,...
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document.write( "                SPEED            TIME          DISTANCE\r\n" );
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document.write( "GOING            r+15            8/(r+15)       8\r\n" );
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document.write( "RETURN           r               8/r            8\r\n" );
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document.write( "DIFFERENCE                       1/2\r\n" );
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\n" ); document.write( "\n" ); document.write( " $\"8%2Fr-8%2F%28r%2B15%29=1%2F2\"$ ------solve for r. \n" ); document.write( "

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