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Hatshy [7]
3 years ago
15

A circle has its center at (-1, 2) and a radius of 3 units. What is the equation of the circle?

Mathematics
2 answers:
Aleks [24]3 years ago
8 0
Hello,

Answer D

(x+1)²+(y-2)²=9
Irina18 [472]3 years ago
5 0

Answer:

(x+1)^2+(y-2)^2=9

last option is correct.

Step-by-step explanation:

We have been given that

Center: (-1,2)

Radius :  3 units

We know that the standard form of the circle is given by

(x-h)^2+(y-k)^2=r^2

Here, h = -2, k = 2, and r=3

Substituting these values in the above formula, we get

(x+1)^2+(y-2)^2=3^2\\\\(x+1)^2+(y-2)^2=9

Therefore, last option is correct.

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3 years ago
Work out the equation of the straight line that passes through (2, 3) and
tatiyna

Answer:

Y=5X-7

Step-by-step explanation:

(2,3)

Y-Yo=m(X-Xo)

Y-3=m(X-2)

Y-3=mX-2m

Y=mX-2m+3

(5,18)

18=m(5)-2m+3

18=5m-2m+3

18=3m+3

18-3=3m

15=3m

15/3=m

5=m

Y=5X-2(5)+3

Y=5X-10+3

Y=5X-7

4 0
2 years ago
Can you guys please help me
xeze [42]
There is an easy way to find y intercept. I can tell you how and show you the answer

1 {Y Intercept = 3 } [ This is where the line crosses the line going from up to down in the middle. ]

{slope = 2/1 } To find the slope you find a place where the slanted line is perfectly on the graph.:

You then go up. { GO UP FIRST! that will be the number on top. Stop when you notice the slanted line to the right is exactly on the graph. So what i did is started at (-1, 1) Then went up twice. I saw that to the right of me was the slanted line which was exactly on the graph. So I went up twice [2] then went right once [1]

To find your equation you just put y= [ y intercept form ] and your numbers you found.
y=2/1x + 3
Make sure you have x after your slope so you know it is always going up, no matter what number you put inside.

IF YOU WANT ME TO DO THEM ALL COMMENT. I WILL DO THEM ALL WITHOUT EXPLANATION.

** NOTE ** If the line is decreasing from the left. “\”it is negative so the slope will me - you will do that for your next question
7 0
3 years ago
Identify the measure of arc HD◠.
Aleonysh [2.5K]
It is 17 bc the 18 times 34
8 0
3 years ago
What is the radius of a circle whose equation is (x 5)2 (y-3)3 42?O 2 unitso 4 unitsO 8 units16 unitsSave and ExitMark this and
dexar [7]

we know that

the equation of the circle is of the form

(x-h)^{2} +(y-k)^{2} =r^{2}

where

(h,k) is the center of the circle

r is the radius of the circle

in this problem we have

(x+5)^{2} +(y-3)^{2} =4^{2}

so

the center is the point (-5,3)

the radius is 4\ units

therefore

the answer is

The radius of the circle is equal to 4\ units

4 0
3 years ago
Read 2 more answers
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