Answer:
-x - 3
Step-by-step explanation:
 
        
                    
             
        
        
        
To find how long it would take him, one has to divide 400 by 160 and then multiply 5 by what that number is. You multiply 5 by the quotient because that is the number that would make it proportional. 400/160 x 5 is 12.5, meaning that the answer is 12.5 minutes, or A. 
        
             
        
        
        
Answer:
the answer to this question is one solution