6 is the mode since it appears the most, 3 times 
        
                    
             
        
        
        
Answer:
 The correct option is  C
Step-by-step explanation:
From the question we are told that 
      The number of independent variables is  
      The number of observation is  
      
Since n is are independent variables then their degree of freedom is  3 
    The  denominator(i.e z) degrees of freedom is evaluated as 
             
           
           
So for the numerator (n) the degree of freedom is  Df(n) = 3
So for the denominator(i.e z) the degree of freedom is  Df(z) = 43
 
        
             
        
        
        
Answer:
A. X = 30º
Step-by-step explanation:
The angle labeled x & the right angle are vertical angles to the one labeled 120º.
Therefore: 
X + 90 = 120
Solve for x:
X + (90-90) = 120 - 90
X = 30
Hope this helps! Have a great day!