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?

Question

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

Answer 1

Which answer do you think is right?

Hint: only two operations are involved here -- addition and multiplication.

Answer 2

isn't it B?

Answer 3

You're right. :-)

Answer 4

thanks :)

Answer 5

You're welcome.

Answer 6

how to make angles of 96 180 147