6th grade math

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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

  • 6th grade math -

    Which answer do you think is right?

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

  • 6th grade math -

    isn't it B?

  • 6th grade math -

    You're right. :-)

  • 6th grade math -

    thanks :)

  • 6th grade math -

    You're welcome.

  • 6th grade math -

    how to make angles of 96 180 147

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