9-5=4 Therefore f=4
Hope this helps
        
                    
             
        
        
        

Remember, a number's additive inverse is simply its opposite.
Let's say we have a number a.
The opposite of a is -a, and the opposite of -a is a.
Thus, the additive inverse of 
 is
 is

Hope it helps.
~Just a felicitous girl
#HaveAnAmazingDay
Feel free to ask if you have any doubts.

 
        
             
        
        
        
Yes he will because 4.75 x 5 = 23.75 plus 0.95 x 5 = 28.5