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April 16, 2014

Homework Help: 6th grade math

Posted by Kate on Sunday, September 25, 2011 at 1:37pm.

Chan drove for X miles at 45 miles an hour, Y miles at 60 miles an hour, and Z miles at 55 miles an hour. Which expression can be used to find the total numbers of hours that Chan drove?

A. (45+60+55)(XYZ)
B. 45X + 60Y + 55Z
C. (45+60+55)/XYZ
D. X/45 + Y/60 + Z/55

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