Answer:
The answer to your question is
Step-by-step explanation:
Real operation

Process
1.- Factor the denominators

2.- Simplify like terms
Cancel (x - y) and (x - 1) because they are in numerator and the denominator
This is the answer or you can expand
3.- Expand
Answer: 0.4
Step-by-step explanation:
We know that the standard deviation of the sampling distribution of mean is given by:-

Given : Standard deviation : 
Sample size : n= 25
Then, the standard deviation of the sampling distribution of mean times will be :-

Hence, the standard deviation of the sampling distribution of mean times=0.4
Answer:
8-12n
Step-by-step explanation:
We can name "a number," "n."
4(2-3n)
Distribute.
4*2=8
4*-3n=-12n
8-12n

➭Doing it all using mental math
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