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allsm [11]
3 years ago
6

Find the population mean or sample mean as indicated. Sample: 17, 11, 8, 12, 22

Mathematics
1 answer:
Dominik [7]3 years ago
6 0

Answer:

mean:12

Step-by-step explanation:

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What is the area of a circle whose equation is (x-3)² + (y + 1) ² =81?
kupik [55]
Okay, first, given the equation, we need to find out what the radius of the circle is. Let us state the general equation of a circle: 

\frac{(x-x_{1})^2}{r^2}+ \frac{(y-y_{1})_^2}{r^2}=1

Where (x_{1}, y_{1}) is the centre of the circle. In this case, we don't need to know the centre. Just the radius. 

Let us start by converting the equation into standard for, which I typed above. Divide both sides by 81. 

\frac{(x-3)^2}{81}+ \frac{(y+1)^2}{81}=1

Great! We now know the radius of the circle. It is \sqrt{81} because it is the bottom fraction. Now we know that the radius is 9. 

So now lets input this into the area of circle formula: 

A=πr^2 

Now we insert our radius. 

A=9^2π 

=A=81π 

You can convert that into a decimal if you wish. 

Hope this helped!

~Cam943, Moderator
4 0
3 years ago
Help pls FAST !! Plsss
Lorico [155]

Answer:

\sqrt{17} , 4.23 , 9/2

Step-by-step explanation:

\sqrt{17} =  4.1231\\

9/2 = 4.5

4.23

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2 years ago
The table shows the rental charges for two car rental companies. For each, there is a flat rental fee, plus a charge per mile dr
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This was probably not answered on time
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Emilio works for the parks department of West Palm City. He tracked how many emails the
MissTica

Answer:

The answer is 50%.

Step-by-step explanation:

I did the question on IXL, and got it right.

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3 years ago
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Paraphin [41]

Answer: 117 degrees

Step-by-step explanation:

8 0
3 years ago
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