im lost on this i never fully understood funtions

Use the functions to answer the question.
f(x) = 2x + 1; g(x) = x^2

Which is the value of (f ◦ g)(–5)?

(Points : 1)
- 49
- 19
51
11

Question

im lost on this i never fully understood funtions

Use the functions to answer the question.
f(x) = 2x + 1;  g(x) = x^2

Which is the value of (f ◦ g)(–5)?

(Points : 1)
      - 49
      - 19
       51
       11

hartnn · Answer

(f ◦ g)(–5) = f(g(-5))
so, first find g(-5) by plugging in x=-5 in g(x)

anonymous · Answer

so i would have -5x^2?

hartnn · Answer

you put '-5' instead of 'x' , so 
|dw:1382207604657:dw|
got this ?