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1 year ago

Can you explain to me how to do number two I'm studying for a quiz and I'm stuck on this one.

Mathematics

1 answer:

Furkat [3]1 year ago

5 0

we have (-3,10) and (7,4), then

$\begin{gathered} (\frac{x1+x2}{2},\frac{y1+y2}{2}) \\ (\frac{-3+7}{2},\frac{10+4}{2}) \\ (\frac{4}{2},\frac{14}{2}) \\ (2,7) \end{gathered}$

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Find the surface area of a pyramid

Sergeeva-Olga [200]

Answer:

88 inches ^2

Step-by-step explanation:

Well find the side of a triangle first.

4*9=26

26/2=18

There are 4 identical triangles

18*4= 72

Now the bottom square

4*4=16

16+72= 88

88 inches ^2

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3 years ago

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Phoenix [80]

Answer:

-1/4

Step-by-step explanation:

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3 years ago

In an effort to determine whether any correlation exists between the price of stocks of airlines, an analyst sampled six days of

vovikov84 [41]

Answer:

Check the explanation

Step-by-step explanation:

Following table shows the calculations:

Delta, X Southwest , Y X^2 Y^2 XY

45.96 38.76 2112.3216 1502.3376 1781.4096

46.8 45.41 2190.24 2062.0681 2125.188

47.93 15.7 2297.2849 246.49 752.501

51.78 49.58 2681.1684 2458.1764 2567.2524

52.17 44.34 2721.7089 1966.0356 2313.2178

47.36 18 2242.9696 324 852.48

Total 292 211.79 14245.6934 8559.1077 10392.0488

Sample size: n =6

Now

$S_{yy}=\sum y^{2}-\frac{\left (\sum y \right )^{2}}{n}=1083.27$

$S_{xx}=\sum x^{2}-\frac{\left (\sum x \right )^{2}}{n}=35.03$

$S_{xy}=\sum xy-\frac{\left (\sum x \right )\left (\sum y \right )}{n}=84.94$

The coefficient of correlation is :

$r=\frac{S_{xy}}{\sqrt{S_{xx}S_{yy}}}=0.436$

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3 years ago

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Nastasia [14]

Answer:

it has infinite solutions because the lines wont end.

Step-by-step explanation:

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2 years ago

Read 2 more answers

Really really need help on ONE math graph question.

Nat2105 [25]

The answer is -3.5, 0.5

7 0

3 years ago