document.write( "Question 1163447: Debbie rides her bicycle to her friends' house. Debbie rides her bike 4mph when going uphill and 12mph when going downhill. If her total time riding was 1 hour, how far is it to her friends' house? \n" ); document.write( "

Algebra.Com's Answer #787534 by ikleyn(52786) $\"\"$ $\"About$

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document.write( "Let d be one way distance.\r\n" );
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document.write( "The time travel uphill is    hours.\r\n" );
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document.write( "The time travel downhill is    hours.\r\n" );
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document.write( "Total time equation is\r\n" );
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document.write( "     +  = 1   hour.\r\n" );
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document.write( "To solve equation, multiply both sides by 12.  You will get\r\n" );
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document.write( "    3d + d = 12\r\n" );
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document.write( "    4d     = 12\r\n" );
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document.write( "     d     = 12/4 = 3 miles.\r\n" );
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document.write( "ANSWER.  One way distance is 3 miles.\r\n" );
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\n" ); document.write( "\n" ); document.write( "On \"time\" equation, see the lesson \r
\n" ); document.write( "\n" ); document.write( " - Time equation: HOW TO use, HOW TO write and HOW TO solve it \r
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