rpjkqchprr rpjkqchprr 07-10-2021 Mathematics contestada 9. For f(x) = -x + 8, which statement is true? A f(x + k) = f(x) + k ction B f(x - k) = f(x) - k C f(x + k) = f(x) + f(k) D f(x - k) = f(x) + k