Equation of a Circle Answers
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What is the center of a circle represented by the equation (x+9)2+(y−6)2=102?
A
(−9,6)B
(−6,9)C
(6,−9)D
(9,−6)2
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Which equations represent circles that have a diameter of 12 units and a center that lies on the y-axis? Select two options.
A
x2 + (y – 3)2 = 36B
x2 + (y – 5)2 = 6C
(x – 4)² + y² = 36D
(x + 6)² + y² = 144E
x2 + (y + 8)2 = 363
What is the center of a circle whose equation is x2 + y2 + 4x – 8y + 11 = 0?
A
(–2, 4)B
(–4, 8)C
(2, –4)D
(4, –8)4
Distance formula:
A
Yes, the distance from (–2, 4) to (1, ) is 4 units.
B
Yes, the distance from (–2, 0) to (1, ) is 4 units.C
No, the distance from (–2, 0) to (1, ) is not 4 units.D
No, the distance from (–2, 4) to (1, ) is not 4 units.5
Which explains how to find the radius of a circle whose equation is in the form x2 + y2 = z?
A
The radius is the constant term, z.B
The radius is the constant term, z, divided by 2.C
The radius is the square root of the constant term, z.D
The radius is the square of the constant term, z.Did you find these answers helpful?
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