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Math Help - Triangle ABC

  1. #1
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    Triangle ABC

    The vertices of triangle ABC are A(-2,1), B(4,8)
    and C(14,-3). If point M(h,0) lies on line segment AC, find h.

    I found the slope of AC to be -1/4.

    I then did the following:

    -1/4 = (0-1)/(h + 2)

    I found h to be 2 but the answer is h = -3.

    What did I do wrong?

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  2. #2
    Junior Member lanzailan's Avatar
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    Quote Originally Posted by magentarita View Post
    The vertices of triangle ABC are A(-2,1), B(4,8)
    and C(14,-3). If point M(h,0) lies on line segment AC, find h.

    I found the slope of AC to be -1/4.

    I then did the following:

    -1/4 = (0-1)/(h + 2)

    I found h to be 2 but the answer is h = -3.

    What did I do wrong?

    i got h=2
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  3. #3
    MHF Contributor
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    Quote Originally Posted by magentarita View Post
    The vertices of triangle ABC are A(-2,1), B(4,8)
    and C(14,-3). If point M(h,0) lies on line segment AC, find h.

    I found the slope of AC to be -1/4.

    I then did the following:

    -1/4 = (0-1)/(h + 2)

    I found h to be 2 but the answer is h = -3.

    What did I do wrong?

    Try sketching the triangle on a cartesian plane . h can't be -3 or else it is out of the line AC.
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  4. #4
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    ok...

    I knew that my answer was correct. Math books tend to have many typos.
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