If f(x) = 4x - 1 and g(x) = 3x + 4, what is f(g(x)) ?

Question

noseboy908 · Answer

With problems like these, whatever is on the inside of the function to find (in this case, it's "g(x)"), that is the part that you will need to substitute into the x variable of the other function. Understand so far?

anonymous · Answer

Ok so it would be fx= 4(3x+4)-1?

Just to warn you I am terrible at math haha :)

noseboy908 · Answer

Not as much as many, I assure you. And you're correct. Now, next step?

anonymous · Answer

Awesome! So now we have to compute the numbers that match. uhmmm

or do we need to use distributive property?

noseboy908 · Answer

Distributive

anonymous · Answer

Ok 12x +16-1

anonymous · Answer

12x+15

noseboy908 · Answer

Yep!, but don't forget to state that f(x) is equal to it.

anonymous · Answer

wow! that was easier than I thought! Thank you for guiding me through this! :)

noseboy908 · Answer

Welcome! Just remember that no matter what variables are used, the one on the inside of the other is what is substituted as x.