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3 years ago

Please help!!! I'll give brainliest!!

Mathematics

1 answer:

WARRIOR [948]3 years ago

3 0

Answer:

James K. Polk.

i learned this is history 2 years ago.

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Consider this linear system:

Galina-37 [17]

Answer: A

Step-by-step explanation:

points

7 0

3 years ago

Read 2 more answers

Pls help im confused D:

Murljashka [212]

Answer:

B is your answer

Step-by-step explanation:

5 0

3 years ago

Kay [80]

Answer:

I think it is A

Step-by-step explanation:

5 0

4 years ago

The toco toucan, the largest member of the toucan family, possesses the largest beak relative to body size of all birds. This ex

grandymaker [24]

Answer:

$m=\frac{332}{182}=1.824$

$b=\bar y -m \bar x=43.615-(1.824*21)=5.311$

So the line would be given by:

$y=1.824 x +5.311$

Step-by-step explanation:

We assume that the data is this one:

x: 15 16 17 18 19 20 21 22 23 24 25 26 27

y: 33 34 33 36 36 47 52 51 41 50 49 50 55

Find the least-squares line appropriate for this data.

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:

$\sum_{i=1}^n x_i =273$

$\sum_{i=1}^n y_i =567$

$\sum_{i=1}^n x^2_i =5915$

$\sum_{i=1}^n y^2_i =25547$

$\sum_{i=1}^n x_i y_i =12239$

With these we can find the sums:

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=5915-\frac{273^2}{13}=182$

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}=12239-\frac{273*567}{13}=332$

And the slope would be:

$m=\frac{332}{182}=1.824$

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

$\bar x= \frac{\sum x_i}{n}=\frac{273}{13}=21$

$\bar y= \frac{\sum y_i}{n}=\frac{567}{13}=43.615$

And we can find the intercept using this:

$b=\bar y -m \bar x=43.615-(1.824*21)=5.311$

So the line would be given by:

$y=1.824 x +5.311$

6 0

3 years ago

What’s the area of rhombus ABCD if ac =10 and BD=13 ?

kompoz [17]

Rhombus Area = (Long Diagonal * Short Diagonal) / 2

Rhombus Area = ( 13 * 10 ) / 2

Rhombus Area = 65

Answer is B

7 0

4 years ago