2 years ago

Which is a correct verbal expression for 9+ n?

Mathematics

2 answers:

Elis [28]2 years ago

6 0

Nine plus a unknown number equals unknown.

HACTEHA [7]2 years ago

6 0

Answer:

The sum of 9 and a number.

Step-by-step explanation:

Sum = Add.

9 = 9

Number = n

Hope this helps :-)

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Answer: A. 6.5

Step-by-step explanation:

Here, the given set = { 15, 19 3, 12, 17, 2, 2, 8}

Mean, $\overline{ x} = \frac{15+19+3+12+17+2+2+8}{8} = \frac{78}{8} = 9.75$

Number of elements, n = 8

$\frac{\sum (|x-\overline{x}|)^2}{n}=42.4375$

Thus, the standard deviation, $\sigma =\frac{\sqrt{\sum(|x-\overline{x}|)^2} }{n}=\sqrt{\frac{339.5}{8}}=\sqrt{42.4375} = 6.51440711\approx 6.5$

⇒ Option A is correct.

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