Answer:
6
Step-by-step explanation:
 
        
                    
             
        
        
        
This is a simple equation.  
The equation is y = 1.6x  with y being the miles and x being the kilometers.
Lets plug the kilometers in.
Y=1.6(7.7)
1.6 *  7.7 = 12.32
12.32 miles is  equal to 7.7 kilometers
HOWEVER
There are about .6 miles in a kilometer, so if you typed this wrong I don't know.  
It is still the same concept.
Y = .6x
Y = .6(7.7)
.6 * 7.7 =  4.8
In this case there are 4.8 miles in 7.7 kilometers
        
             
        
        
        
Answer:
D
Step-by-step explanation:
The line of symmetry is at (-1, 9).
 
        
                    
             
        
        
        
Answer:
(3,1)
Step-by-step explanation:
If you plot both of the points on a graph you get another straight line.
When you connect the dots you get 3,1 as the midpoint of the two segments :))