I dont know all of them sorry. But i think
Its d. If its a list of questions lol. But I could be wrong but i did the math 2 times.
If functions transfer some a to b via some formula, then inverse of such functions transfer b to a via some other formula.
Hope this helps.
To solve, simply do this:

Then you'll get the answer, -7/16
Answer:
I believe it is, 30 minutes of running.
Explanation:
If she spends 12 minutes walking, that means she’s done 6 ‘sets’ of two minutes.
Then, you just have to multiply 6 by 5 and then you get 30.
Answer:
A.b = 210 + 15x
B.b = 210 – 15x
C.b = 195 + 15x
D.b = 195 – 15x
Step-by-step explanation
B is correct. Your starting amount is 210$ And you're taking away 15$ each time she uses the club,x.