Answer:
Yes, 4 + -4 = 0.
Think of it like a number line: The number four is 4 units to the right of the center which is 0, and the number negative four is 4 units to the left of the center. When you add them together, those distances cancel out, and you just get 0.
 
        
             
        
        
        
Answer:
5 in
Step-by-step explanation:
AC = the diameter
FA = the radius
diameter=2*radius
10=2*FA
FA=10/2
FA=5 in
 
        
                    
             
        
        
        
Answer:
29160cm³
Step-by-step explanation:
(18*18*18) *5 = 29160
 
        
             
        
        
        
The area formula for a rectangle = Length x Width 
Let length = L and width = W.
We also know that the length is 3 yards longer than twice it's width.
SO this means L = 3 PLUS 2 times W
L = 3 + 2W
Now plug that into the area formula and we get:
Area = (3 + 2W) x W 
You'll need to multiply everything in the brackets by W. 
So what would (3 + 2W)x W = ?