Question

how do you simplify f(x) = √x ; g(x) =x-7 using (f+g)(x)

Answer 1

(f + g)(x) means add the rules of the two functions

$\sqrt{x}$ is the rule of f(x) and $x-7$ is the rule of g(x)

and because they don't have any like terms to combine, the answer is as follows:

$(f+g)(x)=\sqrt{x} +x-7$