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Math Help - inverse equations

  1. #1
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    inverse equations

    So i know that to find an inverse equation you switch the x and y and then solve for y, but this question has me stumped.
    "Suppose that h(x) and j(x) are inverses, and that h(3) = 7 and j(4) = 9. Find the following:

    (a) j(7)
    (b) h(9)
    (c) h(j(13))"
    I don't know if i am supposed to guess until i find such an equation or if there is a specific way to do it.
    Please help me. I have been guessing for ours and i am no where near the right answer.
    Thanks.
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  2. #2
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    Re: inverse equations

    Quote Originally Posted by sasuke07 View Post
    So i know that to find an inverse equation you switch the x and y and then solve for y, but this question has me stumped.
    "Suppose that h(x) and j(x) are inverses, and that h(3) = 7 and j(4) = 9. Find the following:

    (a) j(7)
    (b) h(9)
    (c) h(j(13))"
    I don't know if i am supposed to guess until i find such an equation or if there is a specific way to do it.
    Please help me. I have been guessing for ours and i am no where near the right answer.
    Thanks.
    It's saying that when x is 3, h is 7. This means that in the inverse function (j), when x is 7, j is 3. So what you do you think j(7) equals?

    Can you do the rest?
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  3. #3
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    Re: inverse equations

    Wow, can't believe i missed that. So just to make sure.
    a. 3
    b. 4
    and c. 13
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  4. #4
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    Re: inverse equations

    Quote Originally Posted by sasuke07 View Post
    Wow, can't believe i missed that. So just to make sure.
    a. 3
    b. 4
    and c. 13
    Corrrrrect
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  5. #5
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    Re: inverse equations

    Yes this is the correct answer .
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