Answer:
60
Step-by-step explanation:
8640/60 is 144. 144 is a perfect square. 12*12 is 144
 
        
                    
             
        
        
        
<h3>
Answer:   20</h3>
Explanation:
For any rectangle, the diagonals are the same length.
AC = BD
7x-35 = 3x+45
7x-3x = 45+35
4x = 80
x = 80/4
x = 20
 
        
        
        
Answer:
Correct I think
Step-by-step explanation:
9 is nearly half of 25. (12.5) Half is equal to 50%. 40 is close to 50 and 9 is close to 12.5. So, he is correct. I think, hope this helps. 
 
        
             
        
        
        
For example fill ur bathtub full of water. then lay down in the tub the water leaving the tub is the force acting back.
        
             
        
        
        
2u-2u-4uequals 2u-2u+3+u+32