document.write( "Question 945767: Find out the average speed of person who rides the first miles at therate of 8 miles an hour the next mile at the rate of 7.5 miles an hour and the third mile at the rate of tm5.5 miles an hour \n" ); document.write( "

Algebra.Com's Answer #577168 by Fombitz(32388) $\"\"$ $\"About$

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$\"D=R%2At\"$
\n" ); document.write( " $\"t=D%2FR\"$
\n" ); document.write( "Time for mile 1: $\"t%5B1%5D=1%2F8\"$
\n" ); document.write( "Time for mile 2: $\"t%5B2%5D=1%2F7.5=4%2F30\"$
\n" ); document.write( "Time for mile 3: $\"t%5B3%5D=1%2F5.5=2%2F11\"$
\n" ); document.write( "So then for the 3 mile distance,
\n" ); document.write( " $\"R=D%2Ft\"$
\n" ); document.write( " $\"R=3%2F%281%2F8%2B4%2F30%2B2%2F11%29\"$
\n" ); document.write( " $\"R=3%2F%28165%2F1320%2B176%2F1320%2B240%2F1320%29\"$
\n" ); document.write( " $\"R=3%2F%28581%2F1320%29\"$
\n" ); document.write( " $\"highlight%28R=3960%2F581%29\"$ $\"mph\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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