Answer:

Step-by-step explanation:
The z-score tells us how many standard deviations a value is away from the mean.
The formula is: 

where x is the value,  is the mean, and s is the standard deviation.
 is the mean, and s is the standard deviation. 
We want to find the z-score for the score of an 83, the mean is 72, and the standard deviation is 5. 

Substitute the values into the formula. 

Solve the numerator. 

Divide. 

The z-score is 2.2, which means the score of 83 is 2.2 standard deviations above the mean. 
 
        
             
        
        
        
You're so pointless ... duh XD
        
                    
             
        
        
        
Answer:
35
Step-by-step explanation:
 
        
             
        
        
        
I think it’s gonna be 6 adults for every 42 students not really sure so sorry if I got it wrong
        
             
        
        
        
Answer:
The answer is  .
.
Step-by-step explanation:
This is because when you multiply them together you get
 ,
,  ,
,  , and
, and 
When you add the like terms you get,
