27. Given: f(x) = v2x - 2, g(x) = x2 - 10, h(x) = 4x, and r(x) = x2 + 2x -9. a. (f + g)(x) = d. g(f(x)) = b. (g)(x - 1) = e. r(h(3)) = c. h(2x - 3) = f. g(f(-7)) =