Answer:
AOC = 20 degrees
Step-by-step explanation:
We know that FOB is 70 degrees, and COF is 90 degrees. So just add 70+90 and get 160 degrees. Then you subtract that from AOB which is 20 degrees.
 
        
             
        
        
        
∵AB=CB
∴∠BAC=∠BCA
∵AB bisect ∠MAT
∴∠MAB=∠TAB
Hope my answer helped u :)
        
             
        
        
        
Answer:
3/10
Step-by-step explanation:there are 10 marbles all together three blue ones
 
        
                    
             
        
        
        
Answer:
- 7 - i
Step-by-step explanation:
Given
(- 10 - 2i) + (3 + i) ← remove parenthesis
= - 10 - 2i + 3 + i ← collect like terms 
= - 7 - i