Decide whether or not the matrix is a probability vector.

A. No
B. Yes

Answer: B

Mathematics

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Solve the system for all real solutions, using any suitable method. ?

What will be an ideal response?

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Solve the problem.How many 2-letter codes can be formed using the letters A, B, C, D, E, F, G, H, and I. Repeated letters are allowed.

A. 512 B. 36 C. 72 D. 81

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Mathematics

Establish the identity.1 + sec2x sin2x = sec2x

What will be an ideal response?

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Mathematics

Multiply. × 

A.
B.
C.
D.

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Mathematics