# inverse equations

• Jul 14th 2012, 09:16 PM
sasuke07
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.
Thanks.
• Jul 14th 2012, 10:12 PM
Prove It
Re: inverse equations
Quote:

Originally Posted by sasuke07
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.
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?
• Jul 14th 2012, 10:19 PM
sasuke07
Re: inverse equations
Wow, can't believe i missed that. So just to make sure.
a. 3
b. 4
and c. 13
• Jul 14th 2012, 10:46 PM
Prove It
Re: inverse equations
Quote:

Originally Posted by sasuke07
Wow, can't believe i missed that. So just to make sure.
a. 3
b. 4
and c. 13

Corrrrrect :)
• Jul 17th 2012, 03:46 AM
kraj8995
Re: inverse equations
Yes this is the correct answer .