Question

Can someone help me with this?

Answer 1

Explanation:

(f + g)(x)

f(x) = 5x + 4

g(x) = x^2

Adding you get

(f + g)(x) = x^2 + 5x + 4

Domain

The domain is everything from -∞ to ∞

Mathematically that is written as -∞ < x < ∞