Answer:
a - (-b), a - (-5)
Step-by-step explanation:
A double negative negative is a positive, so a - (-b) = a + b, and a - (-5) is a + 5. However, a double negative is still a difference, so this answer works. 
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Area of the Rectangular Carpet=12*5=60m²
Area of the Square rug=2*2=4m²
Expressing the area of the rug as a fraction of the total area of the carpet, we have:
 .
.
The fraction of the carpet that is covered by the rug is  .
.
 
        
             
        
        
        
Answer:
Step-by-step explanation:
5x + 2 = 4x - 9
Collecting like terms
5x - 4x = -9 - 2
x = -11
 
        
                    
             
        
        
        
Yes they do parallel from each other <span />
        
             
        
        
        
Associative property of addition