Answer:
C
Step-by-step explanation:
 
        
                    
             
        
        
        
The answer is 78.55 
all you need to do is add 75.9+2.65
        
                    
             
        
        
        
Answer:
angle M = 18°
Step-by-step explanation:
angle M + angle N + angle O = 180°
so from question 
angle M + 5(angle M) + 4(angle M) = 180°
so angle M = 18°
 
        
             
        
        
        
I’m pretty sure your answers are right