We can use two different methods to find our missing angle:
Subtract the two known angles from 180° :
Plug the two angles into the formula and use algebra: a + b + c = 180°
Answer:
(3, -7)
Step-by-step explanation:

20%. total= 5 => total= 25
Answer:
= 3,000,000,000
Step-by-step explanation:
Step 1- Multiply
5×6= 30
Once you've multiplied, you can just add the 0's to 30.
There are a total of eight 0's.
Once you've added all the 0's, you'll get 3,000,000,000.