I just did this I’m gonna have my friend come and answer this for u
Answer:
x = 70; the labeled angles are 110º and 70º.
Step-by-step explanation:
The full degrees will add up to 180º. There are 2x and +40.
Equation: 
Solve: 
Since x=70, 70+40 will equal to 110.
Therefore, "x = 70; the labeled angles are 110º and 70º." is correct.
x is timed by .5 in the first one (A) which would make it the linear function.
For finding the measure of C you should know a line is 180° so 124°+C = 180
now you can say:
C = 180°- 124° = 56 °
so the answer is 56° :)))
i hope this is helpful
have a nice day