Answer:
A. -0.875
Step-by-step explanation:
Find where the points are located 
A=-4.25 
B=2.5
Add the points 
-4.25+2.5=-1.75
-1.75/2=-0.875
 
        
             
        
        
        
Answer:
1: x ^11
2: y ^12
3: x^ 7
Step-by-step explanation:
In 1 we give the sum
In 2 we give the multiple
In 3 we minus 
 
        
                    
             
        
        
        
2+8-z=-24
 ^
 10-z=-24
 -10 -10
——————-
 -z=14
 ———
 -z -z
Z=14
        
             
        
        
        
Y=1/2x+4 this is the way I was taught let me know if It makes since to you