Supplementary means it adds up to 180 degrees.
So if one side is 31 degrees, you would need to subtract that from 180 to find the other side.
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180 - 31 = 149
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The other angle would be 149 degrees.
        
             
        
        
        
Answer:
x = -15
Step-by-step explanation:
-24 + 15 - 6 = x
-9 - 6 = x
-15 = x
 
        
                    
             
        
        
        
Answer:
5,-1 
Step-by-step explanation:
   2,3
+<u> 3,-4</u>
   5, -1
 
        
                    
             
        
        
        
Answer:
3/-8
Step-by-step explanation:
Slope= y2-y2/x2-x1
substitute in: 8-5/-7-1= 3/-8