Answer:
Coordinate of E: (-2,3) Coordinate of G: (2.5, 1.5)
Step-by-step explanation:
You first have to find the midpoints of AC and AB.
AC X coordinate: 
X1+X2/2
Substitute the x points of AC in
1+(-5)/2=-2 
AC Y coordinate:
Y1+Y2/2=3
Substitute the y points of AC in
5+1/2=3
You do the same thing with the AB line. I am pretty sure this works and I hope this helps!
 
        
             
        
        
        
Your answer is 3 raised to 4 that is 3^4.
Hope this helps :)
        
             
        
        
        
The median is 19.5. 16+23 is 39. 39/2 is 19.5
        
                    
             
        
        
        
X^2
You subtract exponents when dividing exponents