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3 years ago

Check attachment for picture but please help with extraneous solution:

Mathematics

2 answers:

Firlakuza [10]3 years ago

6 0

It's C.!!!!!!!!!!!!!

Alinara [238K]3 years ago

3 0

It is going to be c ok your welcome

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Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client

vlada-n [284]

Answer:

$\sum_{i=1}^n x_i = 334$

$\sum_{i=1}^n y_i =611$

$\sum_{i=1}^n x^2_i =13970$

$\sum_{i=1}^n y^2_i =51581$

$\sum_{i=1}^n x_i y_i =26584$

With these we can find the sums:

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=13970-\frac{334^2}{10}=2814.4$

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}=26584-\frac{334*611}{10}=6176.6$

And the slope would be:

$m=\frac{6176.6}{2814.4}=2.195$

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

$\bar x= \frac{\sum x_i}{n}=\frac{334}{10}=33.4$

$\bar y= \frac{\sum y_i}{n}=\frac{611}{10}=61.1$

And we can find the intercept using this:

$b=\bar y -m \bar x=61.1-(2.195*33.4)=-12.213$

So the line would be given by:

$y=2.195 x -12.213$

Step-by-step explanation:

The data given on this case is:

x: 14,12,20,16,46,23,48,50,55,50

y: 24,24,28,30,80,30,90,85,120,110

For this case we need to calculate the slope with the following formula:

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

Where:

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

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

So we can find the sums like this:

$\sum_{i=1}^n x_i = 334$

$\sum_{i=1}^n y_i =611$

$\sum_{i=1}^n x^2_i =13970$

$\sum_{i=1}^n y^2_i =51581$

$\sum_{i=1}^n x_i y_i =26584$

With these we can find the sums:

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=13970-\frac{334^2}{10}=2814.4$

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}=26584-\frac{334*611}{10}=6176.6$

And the slope would be:

$m=\frac{6176.6}{2814.4}=2.195$

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

$\bar x= \frac{\sum x_i}{n}=\frac{334}{10}=33.4$

$\bar y= \frac{\sum y_i}{n}=\frac{611}{10}=61.1$

And we can find the intercept using this:

$b=\bar y -m \bar x=61.1-(2.195*33.4)=-12.213$

So the line would be given by:

$y=2.195 x -12.213$

5 0

3 years ago

Please see attached picture.

Sati [7]

Answer:

Step-by-step explanation:

the arc length is calculated as

arc = circumference of circle × fraction of circle

= 2πr × $\frac{90}{360}$

= 2π × 16 × $\frac{1}{4}$

= 32π × $\frac{1}{4}$

= $\frac{32\pi }{4}$

= 8π ft

3 0

1 year ago

What is the constant of variation in the equation

Agata [3.3K]

The constant in this equation is 1/3 because it's a number

3 0

3 years ago

The equation of a line is y = 1.5x − 2. What are its slope and y-intercept?

miv72 [106K]

Answer:

The slope is 1.5 and the y intercept is -2

Step-by-step explanation:

y = 1.5x -2

This is in the form y = mx+b where m is the slope and b is the y intercept

The slope is 1.5 and the y intercept is -2

3 0

3 years ago

Chloe, Hannah and George are fundraising to cover their expenses to go on an educational trip They wash cars at community hall a

PtichkaEL [24]

Chloe, Hannah and George shared the money in the ratio 2:3:4

Let x be the amount shared

Chloe share amount = 2x

Hannah's share amount = 3x

George's share amount = 4x

Given , Georges share is $452

So 4x = 452

Divide by 4 on both sides

x= 113

Chloe share amount = 2x = 2(113)= 226

Hannah's share amount = 3x = 3(113) = 339

Total amount they raised = 226 + 339 + 452 = $1017

3 0

3 years ago

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