9 to the 2nd power would = 81.
4Step-by-step explanation:
F(3)= 16. Essentially, you need to substitute 3 for x, which would look like this: 3(3) + 7. Then, by using PEMDAS/the order of operations, multiply 3 by 3 to get 9, and then add 7 to get 16.
9 if your in k12 this is the answer trust me i just took the test
