16 Chairs!
I just answered this question yesterday so I know that its 16.
        
                    
             
        
        
        
Explanation
A function is defined as a relation between a set of inputs having one output each,in this case our independent variable is the number of days( d) and the dependent variable would be the number of pizzas
so
Step 1
let the function

therefore, to know the number of pizzas are in the stock after 5 days we need to evaluate the equation for d=3
so

so, after five day there willbe 28 pizzas in stock
I hope this helpsyou 
 
        
             
        
        
        
Answer:
$25 added to her account
Step-by-step explanation: