Here is the equations in standard form
 
        
        
        
Answer:
Pa - Pb
Step-by-step explanation:
The mean of the distribution of sample differences will always be the difference between the population proportion, That is ; Pa - Pb ; This is because according to the central limit theorem which says the sampling distribution of sample means approaches a normal distribution as sample size gets larger irrespective if the shape of the Population distribution. Hence, the distribution of sample differences will follow a normal distribution and the mean will Hence be the difference in the population mean. 
 
        
             
        
        
        
Perform the indicated division ... divide the numerator by the denominator. 
The quotient is the decimal form of the ratio.
        
             
        
        
        
Answer:
(1,3)
Step-by-step explanation:
it moved in the positive X axis (right), and the negative Y axis (down)
 
        
             
        
        
        

Convert decimals to fractions 

Multiply both sides by 10

Move expression to the left. 

Remove zero. 

Solve the quadratic equation. 

Remove parenthesis and calculate. 

Add the numbers

Separate the solutions

The final solution are
