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tamaranim1 [39]
3 years ago
7

Find the center and the radius of the circle with the equation: x^2 +2x + y^2-2y-14 =0

Mathematics
2 answers:
maw [93]3 years ago
6 0
X²+2x+y²-2y=14
adding 1+1 both sides

x²+2x+1+y²-2y+1=14+1+1

(x+1)² +(y-1)² = 4²

x=-1 y= 1 r = 4

hope it helps !!

FrozenT [24]3 years ago
5 0
We need to convert the equation of the circle to standard form only then we can find the radius and the center of the circle.

x^{2} +2x+ y^{2}-2y-14=0 \\  \\ 
x^{2} +2x+ y^{2}-2y=14 \\  \\ 
x^{2} +2(x)(1)+ y^{2}-2(y)(1)=14 \\  \\ 
 x^{2} +2x+1 + (y^{2}-2y+1)=14+1+1  \\  \\ 
(x+1)^{2}+(y-1)^{2} =16 


From this equation we can write:

Center of the circle is (-1,1) and the radius of the circle is 4.
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An isosceles triangle has an angle of 70°. what are the possible values of the other two angles?​
IRINA_888 [86]

Answer:

55 and 55 or 70 and 40

Step-by-step explanation:

A triangle has 180o and an isosceles triangle has two angles that are the same. As 70 is less than half, we have a couple of possible solutions to this. So one possible solution is 70-55-55. So the other possible solution is 70-70-40.

3 0
2 years ago
I need help with Algebra 2. Thank you! :)
andre [41]

Answer:

B: 6.0

Step-by-step explanation:

-3t^2+9t+54 = 0

This is the equation that needs to be solved

Divide both sides by -3

t^2 - 3t - 18 = 0

The factors of 18 are: (1 18) (2 9) (3 6)

3 - 6 = -3 and 3 x -6 = -18

So: (t + 3) (t - 6) = 0

t = -3, 6

It can't be negative so the answer is 6

7 0
2 years ago
What is the equation of the circle described below. Center (-1, 4), radius = √3
Brums [2.3K]

same problem asked and answered here:


brainly.com/question/3583159





7 0
2 years ago
What is the equation of the line whose Y intercept of three and So what is the equation of the line whose Y-intercept is 3 and s
viva [34]

Answer:

y = x + 3

Step-by-step explanation:

the equation ofa line in slope-intercept form is

y = mx + c ( m is the slope and c the y-intercept )

here m = 1 and c = 3, hence

y = x + 3 ← is the equation of the line


3 0
3 years ago
Michelle had 600 fish to feed the dolphins in a zoo. Each dolphins ate the same number of fish. There are 9 dolphins in all. How
garik1379 [7]
600 fish / 9 dolphins = 66.667

9 fish * 66 = 594 fish

600 fish - 594 fish = 6 fish

there are 6 fish left
4 0
2 years ago
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