Circles Worksheets With Answer Keys - Chapter 7.2 Hooked On Conics, Stitz-Zeager Precalculus Book Page 7

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504
Hooked on Conics
7. (x
2)
+ (y + 5)
= 4
8. (x + 9)
+ y
= 25
2
2
2
2
Center (2, 5), radius r = 2
Center ( 9, 0), radius r = 5
2
2
9. (x + 4)
+ (y
5)
= 42
10. x +
+ y
=
2
2
5
1
30
2
2
4
Center ( 4, 5), radius r =
42
Center
, radius r =
30
5
1
,
2
2
2
2
2
11. x
+ (y
3)
= 0
12. x +
+ y
=
2
2
1
3
161
2
5
100
This is not a circle.
Center
, radius r =
1
3
161
,
2
5
10
13. (x
3)
+ (y
5)
= 65
14. (x
3)
+ (y
6)
= 20
2
2
2
2
2
15. (x
1)
+ (y
5)
= 5
16. (x
1)
+ y
=
2
2
3
13
2
2
2
17. x
+ (y
72)
= 4096
2
2

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