HELP I NEED HELP IMIDIETLY SORRY I CANT SPELL IM SO CONFUSED

Answer:
I'm pretty sure you need more information, but I could be wrong
Step-by-step explanation:
Answer:
it's 74
Step-by-step explanation:
A and C are supplementary, that means that they add up to 180.
We know that A is 106, so if we take 180 and subtract 106 from it, we get 74.