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4 years ago

How do you solve quadratics by factoring??

Mathematics

1 answer:

stealth61 [152]4 years ago

6 0

Answer:

https://www.lessonplanet.com/teachers/factoring-and-solving-quadratics-by-factoring?msclkid=d23ce8d1fcfe1c7155d4b5147d5d97ff&utm_source=bing&utm_medium=cpc&utm_campaign=DSA%20-%202019%20(WS)&utm_term=lessonplanet&utm_content=All%20Webpages

Step-by-step explanation:

there is our answer

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Answer:

$s = \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

$s =\sqrt{\frac{(31-35)^2 +(33-35)^2 +(36-35)^2 +(41-35)^2 +(34-35)^2}{5-1}} =3.808$

And the answer for this case would be :

$s= 3.81$ after round the value

Step-by-step explanation:

We have the following data set given:

31, 33, 36, 41, 34

If we want to find the standard deviation we need to find first the sample mean with this formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X = \frac{31+33+36+41+34}{5}= \frac{175}{5}= 35$

Now we can find the sampel deviation with this formula:

$s = \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And replacing we got:

$s =\sqrt{\frac{(31-35)^2 +(33-35)^2 +(36-35)^2 +(41-35)^2 +(34-35)^2}{5-1}} =3.808$

And the answer for this case would be :

$s= 3.81$ after round the value

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