A., B., C., D., are NOT true. I think this is a trick question. Lol 
 
        
             
        
        
        
Answer:
1)  
2)  
3)  
Step-by-step explanation:
Given the expression we have to simplify the expression
1)   
⇒ 
Combining like terms, we get 
⇒ 
2.)    
⇒ 
⇒ 
3.)   
⇒ 
⇒ 
 
        
             
        
        
        
Answer:
True
Step-by-step explanation:
The definition of the function is a relation with exactly one x for each y. x is the domain, and y is the range, so all functions have a domain and a range.
 
        
             
        
        
        
Answer:
The margin of error for the 95% confidence interval used to estimate the population proportion is of 0.0209.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of  , and a confidence level of
, and a confidence level of  , we have the following confidence interval of proportions.
, we have the following confidence interval of proportions.

In which
z is the z-score that has a p-value of  .
.
The margin of error is of:

In a clinical test with 2161 subjects, 1214 showed improvement from the treatment.
This means that 
95% confidence level
So  , z is the value of Z that has a p-value of
, z is the value of Z that has a p-value of  , so
, so  .
. 
Margin of error:



The margin of error for the 95% confidence interval used to estimate the population proportion is of 0.0209.
  
        
             
        
        
        
Answer:
2x^3+3x^2+6x-4/x^2 +1
Step-by-step explanation: