Answer:
x=10
Step-by-step explanation:

Answer:
all of the above A, B, and C are correct.
Step-by-step explanation:
Answer:
x=54
Step-by-step explanation:
easy
180 is a triangle
so
exterior+interior=180
so 180-123
57
now add all up to 180
180=57+x+69
x=54
Answer:
5y+16
Step-by-step explanation:
see image below:)
Answer:
3
Step-by-step explanation: