Answer:
Two angles are called supplementary when their measures add up to 180 degrees.
Answer:
C
Step-by-step explanation:
try to compute this problem
Answer:
42
Step-by-step explanation:
180- half of 42
138= x+ measure of 9
so means
10+6=16means other side is also 16
7=y+x
an arc is half the inner measure
so really 84-42
42
hope this helps
Answer:

Step-by-step explanation:
So we have the equation:

First, combine like terms:"

Now, add 1 to both sides:

Divide both sides by 3:

And we're done!