Answer:
-1 because when you add both functions thats what you get.
The sum of the functions f(x) and g(x) is -1.
What is a function?
A function is a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output. A common notation for a function is "f(x)," where x denotes the input value. Example: f(x) = x/2.
Add both the functions as,
f(x)+g(x)=-x+4+x-5
Collect the like terms of right side,
f(x)+g(x)=-1
Therefore, the sum of the function f(x) and g(x) is -1.
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