document.write( "Question 292561: Beatriz commutes to work every day. On her way to work, there is a lot of Road Reparation going on and she travels at 40 miles per hour. On the way home, the road is new, and she travels at 90 miles per hour. What is Beatriz’s average commute velocity? \n" ); document.write( "

Algebra.Com's Answer #211371 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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going she travels at 40 miles per hour.
\n" ); document.write( "returning, travels at 90 miles per hour.
\n" ); document.write( "What is Beatriz’s average commute velocity?
\n" ); document.write( ":
\n" ); document.write( "Let d = distance traveled one way
\n" ); document.write( "Let s = average speed for the commute
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\n" ); document.write( "Write time equation: Time = dist/speed
\n" ); document.write( ":
\n" ); document.write( "Go time + return time = total time
\n" ); document.write( " $\"d%2F40\"$ + $\"d%2F90\"$ = $\"%282d%29%2Fs\"$
\n" ); document.write( "multiply equation by 360s. results:
\n" ); document.write( "9ds + 4ds = 360(2d)
\n" ); document.write( "13ds = 720d
\n" ); document.write( "Divide both sides by d
\n" ); document.write( "13s = 720
\n" ); document.write( "s = $\"720%2F13\"$
\n" ); document.write( "s = 55.38 mph is the average speed
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