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4 years ago

Please help on 8, 9, and 10! Each answer must Be 9! PLEASE With shown work HELP IS APPRECIATED!

Mathematics

1 answer:

Darina [25.2K]4 years ago

5 0

5, 5, 5, 5

5 + 5 - 5 ÷ 5

5 + 5 - 1

10 - 1

10:

3, 3, 5, 8

3 + 3 - 5 + 8

6 - 5 + 8

6 + 3

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What is the r-value of the following data, to three decimal places

Mrrafil [7]

<h2>Answer:</h2>

Option: A is the correct answer.

A. -0.903

<h2>Step-by-step explanation:</h2>

The formula to calculate correlation coefficient r is given by:

$r=\dfrac{n\sum xy-(\sum x)(\sum y)}{\sqrt{n(\sum x^2)-(\sum x)^2}\sqrt{n(\sum y^2)-(\sum y)^2}}$

x y xy x² y²

4 23 92 16 529

5 12 60 25 144

8 10 80 64 100

9 9 81 81 81

13 2 26 169 4

-------------------------------------------------------------------------

∑ 39 56 339 355 858

Also n=5 ( as there are 5 data points )

Hence, we get:

$r=\dfrac{5\times 339-39\times 56}{\sqrt{5\times 355-(39)^2}\times \sqrt{5\times 858-(56)^2}}\\\\\\r=\dfrac{-489}{\sqrt{254}\times \sqrt{1154}}\\$

$r=-\dfrac{489}{541.40188}=-0.9032$

Hence, the r-value of the following data, to three decimal places is:

A. -0.932

8 0

4 years ago

Re-write the following expression using ADDITION ONLY:<br> 12- 3+16 - 37 - (-20)

poizon [28]

12- 3+16 - 37 - (-20)
=9+16-37-(-20)
=25-37-(-20)
=-12-(-20)
=8
(therefore ur answer would be 8)

3 0

3 years ago

Read 2 more answers

Only answer if you are 100% sure about the answer.

hram777 [196]

Answer:

180

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Two examples of hundreds place

kaheart [24]

0.987
8 is in the hundredths

0.45
5 is in the hundredths

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4 years ago

What is 1 over 8 converted into a decimal?

bearhunter [10]

1/8 into a decimal is 0.125.

3 0

3 years ago