This is a sampling technique used when natural groupings are evident in a statistical population. It is often used in marketing research.
        
             
        
        
        
Answer:
1/6
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
30%
Step-by-step explanation:
So, 20/20 turns to 14/20. How much was taken away? 6/20. What times 20 is 100? 5. So, 5 x 6 is 30. So, there is a 30% decrease
 
        
             
        
        
        
Answer:
-5x²+13x+6
Step-by-step explanation:
(x-3)*(2x-7x-2)
(x-3)*(-5x-2)
-5x²-2x+15x+6
-5x²+13x+6
 
        
             
        
        
        
Step-by-step explanation:
Three-halves = 4 = 6 
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