F(x) = -3x + 7
y = -3x + 7
x = -3y + 7
-3y + 7 = x
-3y = x - 7
y = -1/3x + 7/3
f^-1(x) = -1/3x + 7/3
The answer will be C. the total number of hours Marta spends swimming each visit. Hope it help!
I think it is D but i am not too sure
Answer:
n = 7
Step-by-step explanation:
3n = 21
n = 7
