document.write( "Question 1152022: Carole's car averages 12.8 miles per gallon in city driving and 21.6 miles per gallon in highway driving. If she drove a total of 308.8 miles on 20 gallons of gas, how much of the gas (to the nearest gallon) was used for city driving \n" ); document.write( "

Algebra.Com's Answer #773910 by josgarithmetic(39616) $\"\"$ $\"About$

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R, fuel efficiency
\n" ); document.write( "V, volume of fuel, gallons
\n" ); document.write( "D, distance in miles
\n" ); document.write( " $\"R=V%2FD\"$ \r
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\n" ); document.write( "\n" ); document.write( "Question asks for how many gallons used in the city. Let this quantity be v.\r
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document.write( "                  FUEL EFFC      VOL        DISTANCE\r\n" );
document.write( "CITY              12.8            v         12.8v\r\n" );
document.write( "HIGHWAY           21.6           20-v       21.6(20-v)\r\n" );
document.write( "TOTAL                            20        308.8 \r\n" );
document.write( "

\n" ); document.write( " $\"12.8v%2B21.6%2820-v%29=308.8\"$
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\n" ); document.write( " $\"steps\"$
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\n" ); document.write( " $\"highlight%28v=14%29\"$ \n" ); document.write( "

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