The variable is x. 
Hope that helps :)
        
             
        
        
        
<h3>
Answer:  True</h3>
Explanation:
A rectangle has all four angles that are 90 degrees. The side lengths may or may not all be the same length; however, we do know that the opposite sides are the same length.
A square is a special type of rectangle where all four sides are the same length and all angles are 90 degrees.
If a figure is a square, then it is automatically a rectangle, but not the other way around. 
 
        
        
        
Answer:
72
Step-by-step explanation:
18*4
12*6
8*9
 
        
                    
             
        
        
        
Answer:
weight of a water=0.5
spherical ball is filled With water=0.95.
so dear for 
22\7*0.5*0.95=1.49
 
        
             
        
        
        
Answer:
The smallest integer is -4.
Step-by-step explanation:
Let the smallest integer be x.
Since the integers are all multiples of 4, they are
=> x, x+4, x+8, x+12 and x+16
=> x + x+4 + x+8 + x+12 + x+16 = 20
=> 5x + 40 = 20
Subtract 40 from both sides of the equation
5x +40 - 40 = 20 - 40
5x = -20
Divide both sides by the coefficient of x(which is 5)

x = -4
∴ the smallest integer is -4.
Hope this helps!!!