bbbyy69 bbbyy69 12-11-2019 Mathematics contestada For f(x) = 3x + 1 and g(x) = x2 - 6, find (f+ g)(x). O A. x2 + 3x+7 O B. x2 + 3x - 5 O c. 3x² - 17 O D. 343 - 5