The sum of a certain number and 12 is multiplied by 9 .the result is 12 less than the number ? In number plz Help me

9(x + 12) = 12 - x

Step-by-step explanation: Lets have that "certain" number be x.

answer:   c ?

step-by-step explanation:

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