Evaluate the expression
4 + 3 × [6 ÷ (4 + 2)]2
a. 7
b. 8
c. 9
d. 12

Icould really use some with this question.

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)