6th grade math
posted by Kate .
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

Which answer do you think is right?
Hint: only two operations are involved here  addition and multiplication. 
isn't it B?

You're right. :)

thanks :)

You're welcome.

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