C is the answer I believe
f(x) = 3x + 1
f(9) = 3(9) + 1
f(9) = 27 + 1
f(9) = 28
f(9) = 28. I hope this helps! I have a g00gle classroom where I help with algebra including this. If you are interested, please consider joining. I will post the class code in the comments if it would let me. Sorry it wouln't let me type g0ogle properly.
Answer:
The answer equals -8
Step-by-step explanation:
Order of Operations: BPEMDAS
FOIL - First, Outside, Inside, Last
Step 1: Write out expression

Step 2: Expand

Step 3: FOIL first 2

Step 4: Replace square roots with -2
-2(-2)(-2) = (-2)³ = 8