Answer:
   (4, 7)
Step-by-step explanation:
The point of interest is ...
   P = (2Z +1Y)/(2+1) = ((2·3+6)/3, (2·9+3)/3)
   P = (4, 7)
__
The point that divides the segment into the ratio a:b is the weighted average of the endpoints, with the weights being "b" and "a". The weight of the first end point corresponds to the length of the far end of the segment.
 
        
                    
             
        
        
        
Sorry, can not see the full picture, try uploading the full image of the question.
        
             
        
        
        
Answer:
400
Step-by-step explanation:
40 divided by .1 
 
        
             
        
        
        
Answer:
The estimate is  
Step-by-step explanation:
From the question we are told that   
     The sample size is  n =  522
     The sample proportion of students  would like to talk about school is  
   Given that the confidence level is  90 % then the level of significance can be mathematically evaluated as 
                   
                   
                   
Next we obtain the critical value of   from the normal distribution table, the value is
 from the normal distribution table, the value is  
                
Generally the margin of error can be mathematically represented as 
                
=>            
=>             
Generally the estimate the proportion of all teenagers who want more family discussions about school at 90% confidence level is  
                        
substituting values 
                      