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3 years ago

See the File below for the question.

Mathematics

2 answers:

Tju [1.3M]3 years ago

4 0

Answer:

B-105.4 min

explanation

i just learned that just now

Komok [63]3 years ago

3 0

It’s B :)
105.4 mins

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Find the standard deviation of 21, 31, 26, 24, 28, 26

Vesnalui [34]

Given the dataset

$x = \{21,\ 31,\ 26,\ 24,\ 28,\ 26\}$

We start by computing the average:

$\overline{x} = \dfrac{21+31+26+24+28+26}{6}=\dfrac{156}{6}=26$

We compute the difference bewteen each element and the average:

$x-\overline{x} = \{-6,\ 5,\ 0,\ -2,\ 2,\ 0\}$

We square those differences:

$(x-\overline{x})^2 = \{36,\ 25,\ 0,\ 4,\ 4,\ 0\}$

And take the average of those squared differences: we sum them

$\displaystyle \sum_{i=1}^n (x-\overline{x})^2=36+25+4+4+0+0=69$

And we divide by the number of elements:

$\displaystyle \sigma^2=\dfrac{\sum_{i=1}^n (x-\overline{x})^2}{n} = \dfrac{69}{6} = 11.5$

Finally, we take the square root of this quantity and we have the standard deviation:

$\displaystyle\sigma = \sqrt{\dfrac{\sum_{i=1}^n (x-\overline{x})^2}{n}} = \sqrt{11.5}\approx 3.39$

8 0

3 years ago

I dont Understand this so can anyone help me please!! Thank you

storchak [24]

Youre correect answer is 70

3 0

3 years ago

6d^2+33d+27, what is the answer?

m_a_m_a [10]

$6d^2+33d+27 \\ \\ GCF = 3 \\ \\ 3( \frac{6d^2}{3} + \frac{33d}{3} + \frac{27}{3} ) \\ \\ 3(2d^2 + 11d + 9) \\ \\ 3(2d^2 + 9d + 2d + 9) \\ \\ 3(d(2d + 9) + (2d + 9)) \\ \\ 3(2d + 9)(d + 1) \\ \\$

The final result is: 3(2d + 9)(d + 1)

4 0

3 years ago

660 divided by 15 is the same as?

djyliett [7]

Answer:

Step-by-step explanation:

Just divide 660 by 15 to get 44.

4 0

3 years ago

Which of the following points are on the line given by the equation

Simora [160]

Answer:

A. (2, 1)

D. (-2, -1)

E. (4, 2)

F. (3, 6)

Step-by-step explanation:

Use the equation and plug in each answer choice, and see if it matches.

The first number in the (,) is the x and the second is the y.. so

(3, 8)

3 = x

8 = y

example...

Option B. does not work because.

-2 x 0.5 = -1

Hope this helped! Please mark as brainliest! Thanks!

7 0

3 years ago