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Butoxors [25]
2 years ago
5

I need help with the whole homework and yeah plz answer and who ever answers gets a brainlist answer

Mathematics
1 answer:
pashok25 [27]2 years ago
4 0

Answer:

1.) 357

2.) 221.5

3.) 72

4.) 1653

5.) 265

6.) 296

7.) 43.16

8.) 136

9.) 2486.33

10.)a. 48 b. 3

11.) 79

explantion: It breaks down a division problem into a series of easier steps. As in all division problems, one number, called the dividend, is divided by another, called the divisor, producing a result called the quotient.

https://www.theschoolrun.com/what-is-long-division

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Randall built a scale model of a barn he wants to construct. What is the total volume of the model? Round your answers to the ne
tatiyna

Answer:

brainly.com/question/17024807

Step-by-step explanation:

This question was already asked and I don't want to take that person's credit, but I recommend you going to that link because it has steps, plus the answer!

3 0
3 years ago
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Five observations taken for two variables follow.
I am Lyosha [343]

Answer:

a) Figure attached

b) If we see the scatter plot we can conclude that the possible relation between x and y is linear and with a positive correlation since when the values of x increases the values for y increases as well.

c) Cov (X,Y) = \frac{\sum_{i=1}^n (x_i -\bar X)(y_i -\bar Y)}{n-1}

We can find the numerator like this:

\sum_{i=1}^5 (6-16)(6-10)+(11-16)(9-10)+(15-16)(6-10)+(21-16)(17-10)+(27-16)(12-10)=106

And then:

Cov(X,Y) = \frac{106}{5-1}=26.5

d) r=\frac{5(906)-(80)(50)}{\sqrt{[5(1552) -(80)^2][5(586) -(50)^2]}}=0.693  

Step-by-step explanation:

Part a

For this part we use excel in order to create the scatterplot and we got the result on the figure attached.

Part b

If we see the scatter plot we can conclude that the possible relation between x and y is linear and with a positive correlation since when the values of x increases the values for y increases as well.

Part c

The sample covariance is defined as:

Cov (X,Y) = \frac{\sum_{i=1}^n (x_i -\bar X)(y_i -\bar Y)}{n-1}

We can find the numerator like this:

\sum_{i=1}^5 (6-16)(6-10)+(11-16)(9-10)+(15-16)(6-10)+(21-16)(17-10)+(27-16)(12-10)=106

And then:

Cov(X,Y) = \frac{106}{5-1}=26.5

Part d

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

And in order to calculate the correlation coefficient we can use this formula:  

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}  

For our case we have this:

n=5 \sum x = 80, \sum y = 50, \sum xy = 906, \sum x^2 =1552, \sum y^2 =586  

r=\frac{5(906)-(80)(50)}{\sqrt{[5(1552) -(80)^2][5(586) -(50)^2]}}=0.693  

So then the correlation coefficient would be r =0.693

3 0
2 years ago
Solve the following<br> equations for r:<br> 9r - 66 = 116 - 4r
statuscvo [17]

Answer:

r = 14

Step-by-step explanation:

9r - 66 = 116 - 4r

+4r                 +4r

13r - 66 = 116

     +66    +66

13r = 182

divide both sides by 13

r = 14

Hope this helps!!!

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2 years ago
A circular tablecloth is 5 feet in diameter. What is the approximate distance around its border?
Nezavi [6.7K]
Cicumference is Πx diameter
3.14x5=15.70
6 0
2 years ago
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It takes 4 people 2 days to paint a wall. How long would it take if we got 8 people to do it?
Slav-nsk [51]

Answer:

if it takes 4 people for 2 days

4+4= 8

so it would only take 8 people for 1 day

7 0
3 years ago
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