-4+x=3x+12 (Pls explain how you got it)

The answer is 8.

Step-by-step explanation:

I will explain in the comments

answer:

c) the x-coordinate of the center of the circle increases by 3

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function