The simplified expression of  is
 is 
<h3>How to simplify the expression?</h3>
The expression is given as:

Expressions raise to power 0 is 1.
So, we have:

Apply the law of indices to expression with common base

Evaluate the sum and difference

Remove the bracket

Hence, the simplified expression of  is
 is 
Read more about exponents at:
brainly.com/question/847241
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Answer:
3:20   3/20   3.20
Step-by-step explanation:
 
        
             
        
        
        
Answer: Frequencies . 
Step-by-step explanation:
In statistics theory the chi-square test statistic is calculated by considering each cell and the expected frequency is subtracted from the observed frequency after that the difference is squared, and the total is divided by the expected frequency. This is highlight that the key focus of the chi-square test is the frequencies . 
 
        
             
        
        
        
Answer:
$1.20
Step-by-step explanation:
960÷8=120 :)))))))
 
        
                    
             
        
        
        
Answer:
it is 23. always remember it's supposed to add up to 180. So add up all your numbers and subtract the total from 180 to get your answer