The answer would be 20. Because the whole angle would have to be 90 so you already have 30 so that leaves you with 60 which you divide by 3 and gives you 20
        
                    
             
        
        
        
Answer:
 
 
Step-by-step explanation:
α and β are Supplementary (given) 
 
 
It is given that:
 
 
Plugging the value of α in equation (1), we find:
 
 
 
 
 
 
 
 
 
 
 
 
So, 

 
        
             
        
        
        
Assuming it is a Obtuse Scalene Triangle
Side a = 6
Side b = 15
Side c = 13.0767 = 3√19
        
             
        
        
        
Answer:
slope= 5/3 
Step-by-step explanation:
y=mx+b
slope=m
your welcome