Answer:
a. f(x) = 21 (20) +1 (25) = 445
b. The scenario is a function because each student just have to pay once.
 
        
             
        
        
        
Answer: 6$
Step-by-step explanation: 5 divided by 10 = 2$ so 3 x 2 = 6
I do not hold responsibility if you get it wrong :(
 
        
             
        
        
        
To find the difference, subtract Thea's earnings from Hadley's earnings.

Thea earned $54 more than Hadley.