What is the value of the missing angle

Answer:
30°
Step-by-step explanation:
Since a straight line is 180°, you have to subtract 180 by 150. This will give you 30
Answer:
30
Step-by-step explanation:
First know that one whole line that is open is 180 degrees all i did what add 30 to 150 and i got 180
or you you can do what the other person said subtraction.