Question

If f(x) = 2x2 + 4, find f(3).

22
16
−0.5
40

Answer 1

Answer: 22

Step-by-step explanation: I took the test and I got a hundred on it

Answer 2

You are given the function f(x) with rule

`f(x)=2x^2+4.`

If you want to find f(3), you have to substitute into the function rule the x-value 3 and then determine the f(x)-value:

`f(3)=2\cdot 3^2+4,\\f(3)=2\cdot 9+4,\\f(3)=18+4,\\f(3)=22.`

Answer: correct choice is A