For the given functions f and g, complete parts (a)-(h). For parts (a)-(d), also find the domain.
f(x) = −2x; g(x) = 4x - 5
What is the domain of f - g? Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The domain is {x | x ≥ 0}.
(Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)
B. The domain is {x | x is any real number}.
(c) Find (f ∘ g)(x).
(f ∘ g)(x) =
(Simplify your answer. Type an exact answer, using radicals as needed.)
Enter your answer in the answer box and then click Check Answer.