To my knowledge the answer is C. 24%
GOOD LUCK IF ITS WRONG
For this case we have a system of two equations with two unknowns:

We follow the steps below:
We add the equations:

We divide between 9 on both sides of the equation:

We substitute the value of "x" in the first equation and find the value of y:

Thus, the solution of the system is: (3, -1)
Answer:
(3, -1)
Option two is the correct answer
Hope this helps :)
Answer:
I think x has no value in that function
Step-by-step explanation:
Answer:
Step-by-step explanat số âm vì số âm < số dương mà nhiệt đọ càng thấp thì càng lạnhion: