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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