See the attached picture:

From there we can see that because x equals both to a and b, it must be that a = b.
Answer: 
Step-by-step explanation:
It is important to remember the following:

In this case you can observe in the figure that "x" is an Angle formed by two chords, therefore, you can find its value applying the formula.
Therefore, the value of "x" is this:

The answer is 42,8,6 that it the right answer
Answer:
-4m^5n on egde
Step-by-step explanation: