document.write( "Question 551178: The horse galloped m miles at p miles per hour and then trotted m miles at k miles per hour. What was the average speed for the entire trip? \n" ); document.write( "

Algebra.Com's Answer #359502 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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The horse galloped m miles at p miles per hour and then trotted m miles at k miles per hour.
\n" ); document.write( " What was the average speed for the entire trip?
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\n" ); document.write( "let a = the average speed of the entire trip
\n" ); document.write( ":
\n" ); document.write( " $\"m%2Fp\"$ + $\"m%2Fk\"$ = $\"%282m%29%2Fa\"$
\n" ); document.write( ":
\n" ); document.write( " $\"%28mk%2Bmp%29%2F%28pk%29\"$ = $\"%282m%29%2Fa\"$
\n" ); document.write( "Cross multiply
\n" ); document.write( "a(mk+mp) = (pk*2m)
\n" ); document.write( "a = $\"%28%282pkm%29%29%2F%28%28mk%2Bmp%29%29\"$
\n" ); document.write( "cancel out m
\n" ); document.write( "a = $\"%28%282pk%29%29%2F%28%28k%2Bp%29%29\"$ the average speed for the entire trip
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