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What is the conjugate of the complex number 18i?

A.

18i

B.

-18i

C.

-18

D.

-18i²

What is the conjugate of the complex number 7+3i ?

A.

-7+3i

B.

-7-3i

C.

3i

D.

7-3i

What is the value of the modulus of the complex number 5+12i ?

A.

5-12i

B.

-|5+12i|

C.

|5-12i|

D.

13

The Complex Number System (HSN.CN.A.3)

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