Answer:
-5
Step-by-step explanation:
-2+(-3)
-2-3
-5
 
        
                    
             
        
        
        
Answer:
a)  
 
The 95% confidence interval would be given by (0.799;0.847)
b)  
  
And rounded up we have that n=622
c)  
  
And rounded up we have that n=1068
Step-by-step explanation:
Part a

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by  and
 and  . And the critical value would be given by:
. And the critical value would be given by:
 
The confidence interval for the mean is given by the following formula:  
 
If we replace the values obtained we got:
 
 
The 95% confidence interval would be given by (0.799;0.847)
Part b
The margin of error for the proportion interval is given by this formula:  
 (a)
    (a)  
And on this case we have that  and we are interested in order to find the value of n, if we solve n from equation (a) we got:
 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  
 (b)
   (b)  
And replacing into equation (b) the values from part a we got:
 
  
And rounded up we have that n=622
Part c
 
  
And rounded up we have that n=1068
 
        
             
        
        
        
Answer:
(X+10)(X-3)
Step-by-step explanation:
 
        
                    
             
        
        
        
How many cartons of nails it takes to shingle a roof duh
        
             
        
        
        
Answer: The two integers are 8 and 9.
Step-by-step explanation: Let n represent the number. 
n^2 + (n + 1)^2 = 145
By foiling, this can be rearranged to:
n^2 + n^2 + 2n + 1 = 145
Subtract 145 from both sides:
2n^2 + 2n - 144 = 0
Divide both sides by 2:
n^2 + n - 72 = 0
Factor the polynomial:
(n + 9)(n - 8) = 0
Solve for n:
n = -9, n = 8
Since they need to be consecutive, make the 9 positive. It will be positive either way because it is being squared.
Now, n = 9 and n = 8.
These are your two integers. Hope this helps!