Answer:
32
Step-by-step explanation:
n(A∪B)=n(A)+n(B)−n(A∩B)−−−−−−−(1)
Given n(A)= ? we represent with x
n(B)= 16
n(A∪B) = 32
Substituting in equation 1 to get n(A)
32  = n(A) + 9 − 9
⇒n(A) = 32 − 0
n(A)  = 32
to confirm this we put the values into the formula below
n(A∪B)=n(A)+n(B)−n(A∩B)−−−−−−−(1)
32 =  32 + 9 - 9 
 
        
                    
             
        
        
        
If I’m analyzing the question correct, you would pay 912 in total
        
             
        
        
        
There are 17 dogs who have not learned any tricks.
 
        
             
        
        
        
Answer:
490
Step-by-step explanation:
546-56= 490
490+56= 546