This is a basic subtraction problem :-).
You will subtract how much money the mechanic gives to the supplier; which in this case will be $20, by the total amount of the parts which is $14.56.
20-14.56 = 5.44
Therefore, he will receive $5.44 in change for the transaction.
 
        
                    
             
        
        
        
We know that a square, by definition, has four congruent sides. 
So, simply divide the perimeter by 4, and you will get the expression equivalent to each side: 12p+4/4
3p+1 is equal to one side of the square
 
        
             
        
        
        
Using the four points around the drawing, we can see that angle four is connected to the vertex A. 
The answer I believe is:
D. Vertex A.
Hope I could help! Have a good one.
        
                    
             
        
        
        
The answer is B....................................................................................
        
                    
             
        
        
        
An exponential function displays either a growth or decay behavior going from a low steep to a high steep.