4 rows and 6 seashells in each row. 
Row 1: 0 0 0 0 0 0
Row 2: 0 0 0 0 0 0
Row 3: 0 0 0 0 0 0
Row 4: 0 0 0 0 0 0
You add all of them together 6+6+6+6=24 
Or you could do 6x4 and your answer would be 24
So the answer to the question is 24 seashells. 
        
             
        
        
        
I am pretty sure the value of ‘n’ is 2.5! 
 
        
                    
             
        
        
        
Please give more clear explanation for this question so I can help you.
        
             
        
        
        
Answer: A. 
They did not distribute the 3 to the 4 and -5a correctly.