Answer:
B. 40
Step-by-step explanation:
It looks like a 90-degree angle so...
90 - 30 = 60
60 - 20 = 40
40 would be your final answer.
9 OK there you go
if you don't think this is correct then ask someone else
Answer:combining like terms is technically putting values that have the same variable (letter) Or numbers together to make a more simplified equation
Step-by-step explanation: