document.write( "Question 873255: If you drive 71 mph the first hour and 85 mph the second hour, How many mph do you need to drive to reach 200 mile destination? \n" ); document.write( "

Algebra.Com's Answer #526803 by josgarithmetic(39620) $\"\"$ $\"About$

You can put this solution on YOUR website!
The trip as was done:
\n" ); document.write( " $\"71%2A1%2B85%2A1=200\"$ but you already know this was a 1+1=2 hour trip for 200 miles.
\n" ); document.write( " $\"71%2B85=200\"$
\n" ); document.write( " $\"156%3C%3E200\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Let r = the constant speed desired, instead of the mixed rates.
\n" ); document.write( " $\"r%2A2=200\"$
\n" ); document.write( " $\"r=100\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The question is not well formed. The two hour trip as done is 29 miles short of the whole 200 mile trip. \n" ); document.write( "

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