document.write( "Question 1141265: an athlete can burn 12 calories per minute while running and 5 calories per minute while walking. if the athlete burns 580 calories in 60 minutes, how long is spent on each activity? \n" ); document.write( "
Algebra.Com's Answer #761770 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
Typical Constant Rates problem with two separate uncombined tasks.\r
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document.write( "           RATE           TIME           CALORIES\r\n" );
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document.write( "RUN          12\r\n" );
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document.write( "WALK          5\r\n" );
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document.write( "Totals                      60              580\r\n" );
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document.write( "           RATE           TIME           CALORIES\r\n" );
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document.write( "RUN          12            r              12r\r\n" );
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document.write( "WALK          5            w               5w\r\n" );
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document.write( "Totals                     60             580\r\n" );
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\n" ); document.write( "\n" ); document.write( "\"12r%2B5w=580\"
\n" ); document.write( "\"r%2Bw=60\"
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\n" ); document.write( "\n" ); document.write( "\"12r%2B5%2860-r%29=580\"\r
\n" ); document.write( "\n" ); document.write( "\"12r%2B300-5r=580\"\r
\n" ); document.write( "\n" ); document.write( "\"7r=580-300\"\r
\n" ); document.write( "\n" ); document.write( "\"7r=280\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28r=40%29\"------------time in minutes spent running. \n" ); document.write( "
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