It is A, 60° because 180° (degree of the whole triangle) divided by the three angles is 60.
Answer:

Step-by-step explanation:
3 5/6 ÷ 3 3/4 = 46/45
Answer: f(-3) = 2 x -3 = -6
Answer:
(90 - y) °
Step-by-step explanation:
Complement of angle A = 90° - y° = (90 - y) °