can you help assist me in making sure that i followed the proper steps

Find the average rate of change of f(x) = ~x + 6 on [4, 9]. Round your answer to the nearest hundredth. O 0.14 0.71 O -0.36 O-0.14 Question 2 (5 points) Saved Find (f g)(x) and (f + g)(x) for f(x) = 15x2 + 19x + 6 and g(x) = 5x + 3. ( 8) (x) = 75x3 + 57x2+ 18x+18 (f + g)(x) =3x+2 (f g) (x) = 75x3+ 140x2+ 87x + 18 (f + g) (x) = 3x+2 Of 8)(x) = 3x + 2 (f+ g)(x) =75x3+ 140x2+87x+ 18 (( 8)(x) = 3x +2 (f+ g)(x) =75x3+57x2+18x+18