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Help with these 4 questions please and thanks!!!

1. Find the radius of the circle x2 + 8x - 4 + y2 + 2y = 12

A. 9
B. 3
C. 5
D. 25

2. Find the center and radius of the circle: x2 + 4x + y2 -6y = 10

3. Write the equation of the circle with center (−3, −5) and (2, 5) a point on the circle.

4. Find the center of the circle: x2 + 2x - 8 + y2 = 9

Respuesta :

Ruppy
1. The radius is ✓33≈C
2. Center: (-2,3)
Radius: ✓23
3. Equation: (x+3)^2+(y+5)^2=125
4. Center: (-1,0)

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