I want to say for every 4 followers Katherine has, Zoe has 3 im guessing
        
                    
             
        
        
        
Answer:
do u need other coordinates?
if so B'(1,-1)
C'(1,4)
D'(5,6)
the formula is (-x,y)
hope it helps :)
 
        
             
        
        
        
First set up a proportion because they are similar triangles: 
9/3x-20 = (72+9)/(56+3x-20)
9/3x-20 = 81/3x+36
9(3x+36) = 81(3x-20)
27x+324 = 243x-1620
1944 = 216x
x = 9
        
                    
             
        
        
        
Answer:
The air is .6m^3
Step-by-step explanation:
The volume of a cube is 
V = s^3 where s is the side length
The volume of the tank is 
V = 1^3 = 1 m^3
The volume of the water is 1 by 1 by .4
V = l*w*h
    = 1 *1*.4
    = .4 m^3
The difference must be filled by air
1- .4 = .6 m^3
The air is .6m^3