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3 years ago

Please help PLEASE HELP!!!!!!!!!!!!!!! I AM SUPER DESPARATE I NEED MUCH MUCH MUCH HELP

Mathematics

1 answer:

tekilochka [14]3 years ago

7 0

Answer:

8.v = r 2 πh 3

Step-by-step explanation:

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Mr. Dean has an even number of cats and an odd number of dogs. Show how many dogs and cats he might have

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8 dogs and 7 cats 15 in total

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3 years ago

Read 2 more answers

I NEEDDDD HELPPPP ITS URGENTTTT!!

babymother [125]

Answer:

(x-9)²+(y-5)²=64

Step-by-step explanation:

Centre is (9,5) and radius is 16*pi/2*pi=8. Plug it in the equation of circles

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3 years ago

Mrs. Smith is making cookies. Her recipe calls for 6/8 cup of white sugar and 2/4 cup of brown sugar. How much sugar will Mrs. S

wariber [46]

Answer:

10/8 or 1 and 2/8

Step-by-step explanation:

You can convert 2/4 into 4/8 then all you have to do from there is just add to get 10/8.

Hope I could help! :)

8 0

3 years ago

Consider the relationship between the number of bids an item on eBay received and the item's selling price. The following is a s

n200080 [17]

Answer:

Let's assume the following data:

Price in Dollars (X) 26 29 32 38 47

Number of Bids (Y) 12 13 15 16 18

For our case we have this:

n=10 $\sum x = 172, \sum y = 74, \sum xy = 2623, \sum x^2 =6194, \sum y^2 =1118$

$r=\frac{5(2623)-(172)(74)}{\sqrt{[5(6194) -(172)^2][5(1118) -(74)^2]}}=0.974$

So then the correlation coefficient would be r =0.974

Step-by-step explanation:

Previous concepts

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.

Solution to the problem

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

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

Let's assume the following data

Price in Dollars (X) 26 29 32 38 47

Number of Bids (Y) 12 13 15 16 18

For our case we have this:

n=10 $\sum x = 172, \sum y = 74, \sum xy = 2623, \sum x^2 =6194, \sum y^2 =1118$

$r=\frac{5(2623)-(172)(74)}{\sqrt{[5(6194) -(172)^2][5(1118) -(74)^2]}}=0.974$

So then the correlation coefficient would be r =0.974

5 0

3 years ago

What is the common denominator between 18 and 8??

iVinArrow [24]

18 = 2 x 3 x 3
8 = 2 x 2 x 2

Lowect common denominator is 2 x 2 x 2 x 3 x 3 = 72

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4 years ago