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3 years ago

What are two solutions of x^2-2x-4=-3+9

Mathematics

1 answer:

Verizon [17]3 years ago

5 0

Answer:

x^2-2x=10

a few more steps...

the answer is 1+the square root of 11

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In order for a company's employees to work in a foreign office, they must take a test in the language of the country where they

ArbitrLikvidat [17]

Answer:

$\sum x= 37, \sum y= 672, \sum xy =2907, \sum x^2 =173, \sum y^2 = 51320$

Where:

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}$

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}$

With these we can find the sums:

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=173-\frac{37^2}{9}=20.889$

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i){n}}=2907-\frac{37*672}{9}=144.333$

And the slope would be:

$m=\frac{144.333}{20.889}=6.90953$

Nowe we can find the means for x and y like this:

$\bar x= \frac{\sum x_i}{n}=\frac{37}{9}=4.111$

$\bar y= \frac{\sum y_i}{n}=\frac{672}{9}=74.667$

And we can find the intercept using this:

$b=\bar y -m \bar x=74.667-(6.9096*4.111)=46.241$

So the line would be given by:

$y=6.9096 x +46.241$

And for this case the value of the slope m = 6.9096 means that for every increase of 1 unit in the number of years we have an increase of approximately 6.9096 in the grades of the test.

Step-by-step explanation:

Data given:

x: 3, 4, 4, 5, 3, 6, 2, 7, 3

y: 61, 68, 75, 82, 73, 90, 58, 93, 72

$m=\frac{S_{xy}}{S_{xx}}$

$\sum x= 37, \sum y= 672, \sum xy =2907, \sum x^2 =173, \sum y^2 = 51320$

Where:

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}$

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}$

With these we can find the sums:

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=173-\frac{37^2}{9}=20.889$

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i){n}}=2907-\frac{37*672}{9}=144.333$

And the slope would be:

$m=\frac{144.333}{20.889}=6.90953$

Nowe we can find the means for x and y like this:

$\bar x= \frac{\sum x_i}{n}=\frac{37}{9}=4.111$

$\bar y= \frac{\sum y_i}{n}=\frac{672}{9}=74.667$

And we can find the intercept using this:

$b=\bar y -m \bar x=74.667-(6.9096*4.111)=46.241$

So the line would be given by:

$y=6.9096 x +46.241$

And for this case the value of the slope m = 6.9096 means that for every increase of 1 unit in the number of years we have an increase of approximately 6.9096 in the grades of the test.

3 0

3 years ago

at the end of a bike ride ,everyone drank a 16 fluid ounce bottle of sports drink.if 12 kids and 2 adults were on the bike ride

ZanzabumX [31]

224 i think because we are in the same class and i like boogers and poop

8 0

3 years ago

Please need help thank you

nadya68 [22]

Answer:

5 + 32 = answer

Step-by-step explanation:

PEMDAS

parentheses

exponents

multiplication

division

addition

subtraction

the parts that are in "part" are what i solved in that step and what is in 'a number' is the answer to that step

"(2 + 3)" + 4 (to the power of 2) times "(5 - 3)"

'5' + "4 (to the power of 2)" times '2'

5 + '16' times 2

5 + "16 times 2"

5 + '32'

the answer is 5 + 32. I believe you can solve the last part so technically you solved the problem and I just helped a little. :D

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3 years ago

This is a question I need help with

OverLord2011 [107]

Answer:

Step-by-step explanation:

180=35+90+m∠3

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2 years ago

~(~p) is always equivalent to 1: q 2: (~(~(~ (~p)))) 3: ~P 4: ~q

LUCKY_DIMON [66]

? Wth.....................

7 0

3 years ago