Answer:
x=10.5
Step-by-step explanation:

 
        
             
        
        
        
10(N + 3)
= 10N + 30
Hence, the answer is A.
        
                    
             
        
        
        
Do you have an example of what the "Constant of proportionality" would be for a different question?
        
             
        
        
        
Answer:
55
Step-by-step explanation:
Assuming she deposited the same amount each month.
Total ÷ Months = Amount Deposited Each Month
1,320 ÷ 24 = 55