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February 28, 2015

February 28, 2015

Posted by **Coco** on Wednesday, August 22, 2007 at 3:24pm.

- Math -
**Ms. Sue**, Wednesday, August 22, 2007 at 3:30pmIt seems to me that you need the average of 10 and 8.

18/2 = 9 mph

- Math -
**Reiny**, Thursday, August 23, 2007 at 9:01amNo, it's not that simple

Time for first trip = x/10

time for second trip =x/8

distance of total trip = 2x

rate = total distance/total time

=2x/(x/10 +x/8)

=..

=..

=8.88 mph

- Math -

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