Answer:
This is a hard question I’m not sure
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
<h2>A) a - 1 and B) a + 2</h2>
Step-by-step explanation:

 
        
             
        
        
        
Answer:
20 years old
Step-by-step explanation:
Let us assume that the son's age is x.
Therefore, 
2.5x = 55 - 5
2.5x = 50
x  = 20 years old
hope this helps :)
 
        
             
        
        
        
Answer:
(1,-3)
Step-by-step explanation: