The common denominator is already there 12 is the common denominator!! :)
Answer: 686
Step-by-step explanation: 663 + 23 = 686
Answer: 
Step-by-step explanation:
All radii of a circle are congruent, so by the base angles theorem
Also, angles x and y are inscribed in the same arc, and they are thus congruent, meaning x = 65.
Answer:
c
Step-by-step explanation:
i just used a calculator lol