Choice B would be the correct answer. I hope that helps! :D
        
             
        
        
        
Answer:
-2z-2
Step-by-step explanation:
5z-8-4z-3z+6
5z-4z-3z-8+6
-2z-2
 
        
                    
             
        
        
        
Answer:
g = 55
f = 55
h = 55
Step-by-step explanation:
g = 180 - 25 = 55 
this is because angle on a straight line is equal to 180 degrees
f = 55
alternate angles are equal. f alternates g 
h = 55
opposite angels are equal
 
        
             
        
        
        
Answer:
 
And using the normal standard table or excel we find the probability:

Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  
Solution to the problem
Let X the random variable that represent the avergae number of weeks an individual is unemployed of a population, and for this case we know the distribution for X is given by:
 
  
Where  and
 and  
Since the distribution for X is normal then, the distribution for the sample mean  is given by:
 is given by:
 
We select a sample of n =50 people. And we want to find the following probability
 
And using the normal standard table or excel we find the probability:

 
        
             
        
        
        
Example: Oranges are sold in a bag of 5 for $2. The ratio of roanges to cost is 5:2 if i had 20 oranges for ? cost it would look like: 5/2=20/?