D is correct I believe since the values has an outlier it automatically gets rid of using mean. The dots are somewhat symmetrical. And for something to be skewed the dots are to be “connected”
        
             
        
        
        
Answer:
7x+42
Step-by-step explanation:
 
        
             
        
        
        
Answer:
-764.28
Step-by-step explanation:
Given the joint cumulative distribution of X and Y as 

#First find  and probability distribution function ,
 and probability distribution function , :
:

#Have determined the probability distribution unction , , we calculate the Expectation of the random variable X:
, we calculate the Expectation of the random variable X:

#We then calculate  :
:

Hence, the Var(X) is 764.28  
 
        
             
        
        
        
Angles in straight line add to 180 degrees 
180-142=38
180-133=47
180-38-47=95
180-95=85 degrees
B