Need help ASAP hurry pls

B

Step-by-step explanation:

The average rate of change of f(x) in the closed interval [ a, b ] is

Here a = 1 and b = 3

f(b) = f(3) = 27 ← value of y corresponding to x = 3

f(a) = f(1) = 3 ← value of y corresponding to x = 1, thus

average rate of change = = = 12 → B

answer: standard form is ax^2 + bx + c = 0

step-by-step explanation:

standard form is ax^2 + bx + c = 0

(2x + 1)(x - 2) = 0

distribute to get into standard form

2x^2 - 4x + x - 2 = 0

2x^2 - 3x - 2 = 0

a = 2, b= -3, c = -2

a is your answer

x

step-by-step explanation: