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Math Help - Inverse variation problem (please check)

  1. #1
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    Inverse variation problem (please check)

    n is inversely proportional to t+3. If t = 1 when n = 3, find t when n = 4

    Here is my work:

    n = k/t +3
    3 = k/1+3
    3(4) = k
    12 = k

    ... find t when n = 4:

    y = 12/n
    y = 12/4 = 3/1 = 3
    y = 3

    Thanks
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  2. #2
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    Joined
    Jul 2009
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    Nicely done for the first half of your solution,
    but after you found k = 12 you made a tiny mistake.

     n = \frac{12}{t+3}

    In order to find t, we substitute n by applying the given condition that n = 4.
    This operation gives

     4 = \frac{12}{t+3}

    Then we put them in a better order

     t+3 = \frac{12}{4} = 3

    At last we find t = 0.
    So your work is basically okay but incomplete ~
    Last edited by Ephemerasylum; August 12th 2009 at 04:52 AM. Reason: Improved formatting.
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