Answer: A and B
Explanation: A sum is an answer to an addition problem and a difference is the answer to a subtraction problem. N is the sum to the addition problem and -n is the answer to a subtraction problem.
 
        
                    
             
        
        
        
100 is 101 to the nearest ten
        
                    
             
        
        
        
Charles-C
Sharon- S
Jason-J
C=y
S= 3y
J=(3y)+50
        
             
        
        
        
Answer=72%
25-7=18purple clips
  18       x
____=____
  25     100
cross multiply
25x=1800
divide both sides by 25
x=72%