The simplified expression of
is 
<h3>Complete question</h3>
Simplify the expression: (x³ + (-y)³) / (x - y)
Do not include parentheses in your answer.
<h3>How to simplify the expression?</h3>
The expression is given as:

Open the inner bracket

Apply the difference of two cubes to the numerator

Cancel out the common factors

Hence, the simplified expression of
is 
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Answer: The standard error of the mean = 0.5
Step-by-step explanation:
Given : Sample size : n = 144
Standard deviation : 
The formula to find the standard error of the mean is given by :-

i.e. 
Hence, the standard error of the mean =0.5
Answer:
3547.90
Step-by-step explanation: