10 would be the answer I believe.
        
                    
             
        
        
        
Step-by-step explanation:
We can prove that the triangles are congruent using the SAS method.
It's given that GH and JH are congruent (S)
Angle GHF and Angle IHJ are equal since they are vertically opposite (A)
It's given that FH and HI are congruent (S)
Thus, the triangles are congruent, which implies that the remaining sides are equal.
 
        
             
        
        
        
Answer:
=$306
Step-by-step explanation:
9/20*$680
 
        
             
        
        
        
Um, I never learn this, sorry but I’m in online class
        
             
        
        
        
AB =

The midpoint os segment AB = 

The midpoint is:
(1,-4)