Equation of a Circle Answers
0 verified answers
1
Free Preview
Which equation represents a circle that contains the point (–5, –3) and has a center at (–2, 1)? Distance formula:
A
(x – 1)2 + (y + 2)2 = 25B
(x + 2)2 + (y – 1)2 = 5C
(x + 2)2 + (y – 1)2 = 25D
(x – 1)2 + (y + 2)2 = 52
Free Preview
What is the radius of a circle whose equation is x2+y2+8x−6y+21=0?
A
2 unitsB
3 unitsC
4 unitsD
5 units3
A sprinkler is designed to water a circular area that has a radius of 7 feet. The sprinkler is located at (0,0) on a lawn. A flowerbed is planted 3 feet east and 6 feet south of the sprinkler.Determine if the distance from the flowerbed to the sprinkler places the flowerbed on or within the circular area that this sprinkler can water.
A
No. The flowerbed is 18 feet away from the sprinkler, which is more than the 7-foot radius.B
Yes. The flowerbed is exactly 7 feet away from the sprinkler.C
No. The flowerbed is 9 feet away from the sprinkler, which is more than the 7-foot radius.D
Yes. The flowerbed is √45 feet away from the sprinkler, which is less than the 7-foot radius.4
Which point is on the circle centered at the origin with a radius of 5 units?Distance formula:
A
(2, )
B
(2, )
C
(2, 1)D
(2, 3)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?
Verified answers available
TRY EDGENUITY HACKS
- Auto Complete Exams
- Auto Complete Assignments
- Skip Videos Instantly
50,000+ students using this