Show What You Know About i and Equations of Circles
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by Mike Ritter
| 5 Questions
1
5 pts
What is (3 + 2i) (4 + 4i)
2
1 pt
5i is equal to -5.
True
False
3
1 pt
Write the equation of a circle with a center at (-5, 4) and a radius of 4.
4
1 pt
What is the radius of a circle with a center at (4, 2) and has (2, 4) on the circle.
5
1 pt
The center and the radius of :(x-5)^2 + (y+7)^2 =9 is...
A (5,-7), r=9
B (-5, 7), r=9
C (-7, 5), r=3
D (5, -7), r=3
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