Solve the problem.How many 3-letter codes can be formed using the letters A, B, C, D, E, F, G, H, and I. Repeated letters are allowed.

A. 729
B. 19,683
C. 84
D. 504


Answer: A

Mathematics

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Decide whether the statement is true or false.All whole numbers are real numbers.

A. True B. False

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Multiply. Then simplify if possible. Assume that all variables represent positive values. ?   

A. 5x
B. 15x2
C. 15
D. 15x

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Solve the problem.Using a phone card to make a long distance call costs a flat fee of $0.86 plus $0.30 per minute starting with the first minute. Find the total cost of a phone call which lasts 12 minutes.

A. $4.46 B. $12.26 C. $10.62 D. $3.60

Mathematics

Multiply.7(9 ? x)

A. 630x B. 56x C. 63x D. 53x

Mathematics