Answer:
maybe 3(5+x)
Step-by-step explanation:
I don't know if this is what you're looking for but if you factor the expression that is what you would get. It is something equivalent.
 
        
             
        
        
        
1) The formula used for determining the confidence interval is 
Sample mean +/- Critical value (or z-score corresponding to 90% confidence) * Standard 
error of mean 
8439 +/- 1.645 * 100/sqrt 25 
8439 +/- 1.645 * 20 
8439 +/- 32.9 
2) The only difference in this case is finding the critical value i.e., z-score corresponding to 92% confidence which is 1.75 approximately 
Then the confidence interval is 
8439 +/- 1.75 * 100/sqrt 25 
8439 +/- 1.75 * 20 
8439 +/- 35 
Lower limit is 8439 - 35 = 8404 
The upper limit is 8439 + 35 = 8474
        
             
        
        
        
Answer:
Your graph should be 5 units up and showing an exponential decay with its horizontal asymptote being 5.  The slope should also be stretched by 5.
Step-by-step explanation:
Hopefully, this helps!  If you're still having problems with the equation, then I recommend you to use a graphing calculator to see what you are doing.
 
        
             
        
        
        
(a) and (b) looks correct
(c) Here's how my table looks like:
15    -18      324
27    -6       36
28    -5       25
34     1         1
42     9        81
52     19      361
           SUM 828
(d) Take the sum of 828 and divide it by 6 to get 138.  Now take the square root of 138 to get the standard deviation:
sqrt(138) ≈ 11.75
        
             
        
        
        
Answer:
y=28
Step-by-step explanation:
6x-y=2
-y=2-6x
y=6x-2
4x-(6x-2)=-8
4x-6x+2=-8
-2x=-10
x=5
y=6*5-2=30-2=28
y=28