You can try to use the internet for the answer to some of those questions.
        
                    
             
        
        
        
1.<span>5 ounces for $2.50
2.divide both of the numbers by 5
3.you get 1 ounce for 0.50  cent</span>
        
                    
             
        
        
        
Answer:
$3 per attendee
Step-by-step explanation:
($100 - $40) / (20 - 0) = $3 per attendee
 
        
             
        
        
        
Answer:
Vertical Pair 
Step-by-step explanation:
...............It's Vertical..........
 
        
             
        
        
        
Answer:
28.50+x or 28.50x 
Step-by-step explanation:
6*4.75=28.50
6*x=6x or x