Answer: C
Step-by-step explanation: all real numbers can solve this problem
Hi! :) 19.7 - 6.8 is 12.9. If you need anymore help, ask me!
The answer is B. The values of y must only be positive because it is equal to

The other options states that the values of y could be negative which is why it is wrong.
Answer:
they are adjacent angles
Step-by-step explanation: