Answer:
-9
Step-by-step explanation:
few words about function notation. If f is a function, then f(x) is the
value of the function at x, usually denoted by some sort of rule for finding
the value of the function given that you know the value of x. f(a) would be
the value of the function at a, and f(4) would be the value of the function at,
=4
In this case the value of the function f at x, or f(x) is given by the rule:
f(x) = -x - 5 You want to know f(4), which is the value of the function at
4, so f(4) = -(4) - 5 = -9
