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Answer :

Answer: the answer is  3

Step-by-step explanation:

This says to put " 3"  into 2x + 4 and then evaluate

So

2(3)  + 4  =

6 + 4  =

10

'x'  can be thought of as a "box" that contains some number.....in this case, the number is 3......!!!

Answer:

-10

Step-by-step explanation:

f(x) = 2x - 4

f(-3) = 2(-3) - 4

f(-3) = -6 - 4

f(-3) = -10