Question

Let f(x) = x – 2 and g(x) = 3x + 4. What is f(g(x)) ?

2x – 2

3x + 2

4x + 2

2x + 6

Answer 1

this means you solve g(x) first...then put that answer into f(x)

what number / variable are we plugging in? (x)

so g(x) = 3x + 4
weplug in x...every time we see an x....which in this case...is already done lol

so now we take that answer ( which is the equation) and plug it into f(x)
we put 3x + 4 in everytime we see x in f(x)

so we have

f(x) = 3x + 4 - 2

what does f(x) equal?