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a round trip car ride took 12 hours. the first half of the trip took 7 hours at a rate of 45 miles per hour. what was the average rate of speed on the return trip?

  • math -

    Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you.

    See your later posts.

  • math -

    I have no clue

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