In circle B, m DAC = 60°. Solve for v ifmDC = (7x – 42)°. If necessary,
round your answer to the nearest tenth.

Answer: 23.1
Step-by-step explanation:
By the inscribed angle theorem, we know the measure of arc DC is 120 degrees. So, we can set 120=7x-42.
162 = 7x
x = 162/7, which is about 23.1