Answer:
B) 9
Step-by-step explanation:
6×3/2=9
 
        
             
        
        
        
Answer:

Step-by-step explanation:

 
        
             
        
        
        
Simply the standard deviation of the data values is the square root of the variance:

=18
Answer: 
D)18  
 
        
        
        
Answer:
B=119
Step-by-step explanation:
C=180-112=68
68+51=119
A=180-119=61
180-61=119
B=119
 
        
                    
             
        
        
        
The answer is x=-21 im absolutly positive