Answer:
A
Step-by-step explanation:
(f+g)(x) means to do f(x)+g(x). We will add both functions together.

Answer a
Answer: blank 1 = 360
blank 2 = 42
Steps:
Solve for x
87 + 55 + 80 + (x + 96) = 360
222 + (x + 96) = 360
222 + x + 96 = 360
318 + x = 360
x = 42
Check:
87 + 55 + 80 + (x + 96) = 360
87 + 55 + 80 + 42+ 96 = 360
360 = 360 ✅