This is how I would do it, hope this helps!
Answer:
f(9) =21
Step-by-step explanation:
I will assume you want to find f(9) when x=9
Let x=9
f(9) = 2(9) +3
= 18+3
=21
f(9) =21
The answer is 5/6 because you need to flip the numbers.
The answer is certainly c because i did that and got it right
