document.write( "Question 1089353: Riding mostly downhill, Joan rode her ten-speed bicycle to the state fair in 1.5 h. It took 4.2 h to make the return trip, since her average speed was 36 km/h less than her average speed on the way tot he fair. Find her average speed in each direction. \n" ); document.write( "

Algebra.Com's Answer #703689 by josgarithmetic(39625) $\"\"$ $\"About$

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\r\n" );
document.write( "             SPEED       TIME      DISTANCE\r\n" );
document.write( "DOWNHL        r          1.5        d\r\n" );
document.write( "UPHILL       r-36        4.2        d\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( " $\"1.5r=4.2%28r-36%29\"$ \r
\n" ); document.write( "\n" ); document.write( "-\r
\n" ); document.write( "\n" ); document.write( " $\"15r=42%28r-36%29\"$
\n" ); document.write( " $\"5r=14%28r-36%29\"$
\n" ); document.write( " $\"5r=14r-14%2A36\"$
\n" ); document.write( " $\"9r=14%2A36\"$
\n" ); document.write( " $\"highlight%28r=56%29\"$ ----downhill
\n" ); document.write( " $\"highlight%2820%29\"$ -----uphill \n" ); document.write( "

\n" );