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College Algebra

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two trains leave a train station at the same time. One travels east at 10 miles per hour, the other travels west at 9 miles per hour. In how many hours will the two trains be 45.6 miles apart?

  • College Algebra - ,

    let x = time it takes for them to be 45.6 miles apart (in hours)

    recall: (speed)*(time)=distance
    >>since they travel in opposite directions, the distances between the station to their present location will be added.
    10x + 9x = 45.6
    19x = 45.6
    x = 2.4 hours

    so there,, =)

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