document.write( "Question 762423: if you travel from point a to point b at 20 miles an hour and you return at 40 miles an hour what is your ave speed? \n" ); document.write( "

Algebra.Com's Answer #463942 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
It seems obvious, but you should always use the
\n" ); document.write( "equation:
\n" ); document.write( "average speed = ( total distance ) / ( total time )
\n" ); document.write( "Let $\"+d+\"$ = the one-way distance
\n" ); document.write( "Let $\"+t+\"$ = the total time
\n" ); document.write( "----------------------
\n" ); document.write( " $\"+t+=+d%2F20+%2B+d%2F40+\"$
\n" ); document.write( "again:
\n" ); document.write( "average speed = ( total distance ) / ( total time )
\n" ); document.write( "average speed = $\"+2d+%2F+%28+d%2F20+%2B+d%2F40+%29+\"$
\n" ); document.write( "Divide through by $\"+d+\"$
\n" ); document.write( "average speed = $\"+2+%2F+%28+1%2F20+%2B+1%2F40+%29+\"$
\n" ); document.write( "average speed = $\"+2+%2F+%28+4%2F80+%2B+2%2F80+%29+\"$
\n" ); document.write( "average speed = $\"+%28+80%2F6+%29%2A2+\"$
\n" ); document.write( "average speed = $\"+26.667+\"$ mi/hr
\n" ); document.write( " \n" ); document.write( "

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