X values are increasing by 2
y values are increasing by 4
Mark is correct
        
                    
             
        
        
        
Answer:
$3.45
Step-by-step explanation:
The tip is 15% of his breakfast, that means 15% of 23
That is 15%* 23= 15*23/100= 3.45 $
The tip is $3.45
Have a good day.
 
        
             
        
        
        
Answer:
25 boys. 
Step-by-step explanation:
To solve this problem, first add the two parts of the ratio. 9 + 5 = 14. Then divide 70 by 14 to get 5. Since the total is 5 times the ratio total, multiply both sides of the ratio by 5. The result is 45 : 25. If you add them together, you get a total of 70. Therefore, there are 25 boys in the class. 
 
        
                    
             
        
        
        
Answer:
I think #2
Step-by-step explanation: