Answer:
A) 150
Step-by-step explanation:
All the angles in a triangle must add up to a total of 180 degrees.
So we can make an equation as given below:
20+10+?=180
30+?=180
?=150
So the missing angle is 150 degrees
its 14n+21. 7×2n is 14n, and 3×7 is 21
Answer:
7.5
Step-by-step explanation:
