document.write( "Question 1165931: A family has two cars. During one particular week, the first car consumed 30 gallons of gas and the second consumed 35 gallons of gas. The two cars drove a combined total of 1650 miles, and the sum of their fuel efficiencies was 50 miles per gallon. What were the fuel efficiencies of each of the cars that week?
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Algebra.Com's Answer #790431 by josgarithmetic(39620) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "              Fuel Effic.     Volume          DISTANCE\r\n" );
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document.write( "firstcar       x              30              30x\r\n" );
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document.write( "secondcar      y              35              35y\r\n" );
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document.write( "totals        50                             1650\r\n" );
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\n" ); document.write( "\n" ); document.write( " $\"system%28x%2By=50%2C3x%2B3.5y=165%29\"$ -----------solve system in any way you want.\r
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\n" ); document.write( "\n" ); document.write( " $\"system%283x%2B3y=150%2C3x%2B3.5y=165%29\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"EQ2-EQ1\"$ :\r
\n" ); document.write( "\n" ); document.write( " $\"0.5y=15\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=15%2A2\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"highlight%28y=30%29\"$ -------------simple arithmetic will give $\"highlight%28x=20%29\"$ \n" ); document.write( "

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