What is -9 x (-3) ????
1 answer:
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Variance of a continuous random variable X is defined as
Standard deviation is defined as
Hence standard deviation is the positive square root of variance.
Answer:
-3 times the square root of 5
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Explanation:
Let
Replace all the root 5 terms with x and we go from
to
From here, combine like terms to get
and the last thing to do is replace the x with sqrt(5)
Meaning that,