Answer:
175 is the answer the percentage is 75
 
        
             
        
        
        
Let me use Python to find the answers 
Program.

![\tt Prices=[75,120,120,145,150,150,150,175,175,200,225,275]](https://tex.z-dn.net/?f=%5Ctt%20Prices%3D%5B75%2C120%2C120%2C145%2C150%2C150%2C150%2C175%2C175%2C200%2C225%2C275%5D)



Output:;
- Mean=163.333
- Median=150.0
- Mode=150
Console attached 
 
        
                    
             
        
        
        
(b - 4z)/7 = a 
b - 4z = 7a 
b = 7a + 4z 
Answer: b = 7a + 4z 
        
             
        
        
        
Answer:
1/3 is the answer 
Step-by-step explanation: