I believe it's 1. hope this helps
Answer:
x=21
Step-by-step explanation:
We know that C is a right angle, which means that x + 3x+6 = 90

Have a nice day. hope I helped please rate brainliest!
Answer:
2,3,4,5,6,7,8,9,10,...29
Step-by-step explanation:
The answer I would go with is A.
Answer:
Step-by-step explanation: 85 students and 80 adults