Question

Consider the functions f(x) = 3x2 and g(x) = −2x − 5. What is the value of f[g(−4)]?

9
−31
27
3

Answer 1

calculate g(-4) first

Answer 2

How?

Answer 3

g(-4) = -2 (-4) -5
= 8 - 5
= 3

Answer 4

now substitute 3 in f(x)

Answer 5

f(3) = 3* 3^2
= 27

Answer 6

so that's the answer

Answer 7

thank you so much! I think I understand the whole thing now! hopefully ill be able to do the next one on my own haha

Answer 8

Good luck with them!!