Answer: there are three of the holidays 
Step-by-step explanation:
The prime numbers through 31 include 2,3,5,7,11,13,17,19,23,29,31,and 37 so therefore three of the holidays (Martin Luther, Easter, and Thanksgiving) fall on days that are prime numbers
 
        
             
        
        
        
Let the reduced price be x
If he paid for 6 rounds, he paid 1 round at full price of $19 and 5 rounds at reduced price:
19 + 5x = 59
5x = 59 - 19
5x = 40
x = 40 ÷ 5 
x = 8
The reduced price is at $8 per round.
        
             
        
        
        
The answer is 14.33333 but you will have to round which you will just have 14.3
        
                    
             
        
        
        
I think It would be -4-(-8)/2-(-9)=-4+8/2+9=4/11 is the equation by using y2-y1/x2-X1 
Sorry If I'm wrong.