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Ratling [72]
3 years ago
6

Please help!! I don’t know how to find the equation of a circle. Tell me how you got the answer , thank youuuu

Mathematics
2 answers:
LekaFEV [45]3 years ago
8 0

Check the picture below.

\bf \textit{equation of a circle}\\\\ (x- h)^2+(y- k)^2= r^2 \qquad center~~(\stackrel{0}{ h},\stackrel{-3}{ k})\qquad \qquad radius=\stackrel{2}{ r} \\\\[-0.35em] ~\dotfill\\[1em] [x-0]^2+[y-(-3)]^2=2^2\implies x^2+(y+3)^2=4

zhenek [66]3 years ago
7 0

Answer:

x^2  + (y + 3)^2 = 4

or

x^2 + y^2 + 6y + 5 = 0.

Step-by-step explanation:

We see from the diagram that the center of the circle is at (0, -3)  and radius is 2.

The general form for a circle is  (x - a)^2 + (y - b)^2 = r^2  where  (a, b) is the center and r = the radius.

So substituting the given values the equation is:

(x - 0)^2 + (y - -3)^2 = 2^2

x^2  + (y + 3)^2 = 4  (answer).

If you want it in expanded form it is

x^2 + y^2 + 6y + 5 = 0.

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<img src="https://tex.z-dn.net/?f=8%20%2B%20y%20%3D%203y" id="TexFormula1" title="8 + y = 3y" alt="8 + y = 3y" align="absmiddle"
aksik [14]

Answer:

8 + y = 3y

8 = 3y - y

8 = 2y

8/2 = y

<h2>4 = y</h2>
8 0
3 years ago
Read 2 more answers
Please help! [99 points]
anygoal [31]
This is a linear function.

A linear function is a straight line that has a slope, and follows the formula: <em>
y = mx + b</em>

In which: 
y = y
m = slope
x = x
b = y -intercept


hope this helps<em />
4 0
3 years ago
Read 2 more answers
PLEASE I NEED HELP WITH THIS
Ber [7]

Given:

The figure of a circle.

To find:

The measure of arc AD and measure of each arc.

Solution:

The measure of arc is equal to the central angle of that arc.

The central angle of arc AD is 105 degrees. So,

m(arc(AD))=105^\circ

The central angle of arc BC is 35 degrees. So,

m(arc(BC))=35^\circ

The central angle of arc CD is 50 degrees. So,

m(arc(CD))=50^\circ

The central angle of a complete circle is 360 degrees. So,

m(arc(AD))+m(arc(BC))+m(arc(CD))+m(arc(AB))=360^\circ

105^\circ+35^\circ+50^\circ+m(arc(AB))=360^\circ

190^\circ+m(arc(AB))=360^\circ

m(arc(AB))=360^\circ-190^\circ

m(arc(AB))=170^\circ

Therefore, the measure of arc AD is 105°, the measure of arc BC is 35°, the measure of arc CD is 50° and the measure of arc AB is 170°

3 0
2 years ago
Identify any outlier(s) in the data.
GarryVolchara [31]
12 because the rest of the numbers are all similar except 12
6 0
3 years ago
How long is the segment from(-5,2)to(-5,-8)
dusya [7]

Answer:

10

Step-by-step explanation:

To calculate the distance d use the distance formula

d = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = (- 5, 2) and (x₂, y₂ ) = (- 5, - 8)

d = \sqrt{(-5+5)^2+(-8-2)^2}

  = \sqrt{0^2+(-10)^2}

  = \sqrt{0+100} = \sqrt{100} = 10

6 0
3 years ago
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