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if we solve the problem:
y = x^2 - 16; for x, what does it look like?

and technically, there is no inverse function stated in the choices :/

I have no idea :(

What would I do first?

would you agree that we can subtract 16 from each side to start to get x all alone?

err, add 16 to each side that is

Yes so it would be y = x^2/16? So C?

do you know how we can get the "^2" off the x?

Multiply it?

Ohhhhh so it's B then?

B seems the most reasonable answer to me :)

Okay thank you! I have one more like this, could you help me with it too?

i can take a look at it sure

Let f(x) = 5x + 12. Find f–1(x).

- 12 from each side
y = 5x + 12
- 12 - 12
y - 12 = 5x

so far so good, now to uncover the x, we should divide off that pesky looking 5 right?

Yes so..
y - 12 = 5x
----------
5
y - 12/5 = x

I think I'm confusing myself

you did fine, lets just make sure its looks "proper" :)
\[\frac{y-12}{5}=x\]

Okay the closest choice I have to that is |dw:1360095933270:dw|

that will work fine ;)

good luck

Okay awesome, thank you!! :)