Write the expression in standard form.(-7 + 4i) - 9

A. 2 + 4i
B. 16 - 4i
C. 2 - 4i
D. -16 + 4i


Answer: D

Mathematics

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Mathematics

Solve the problem.The average weight of a Sample X is 15 times the average weight of a sack of Sample Y. If the average weight of Sample X is 409 pounds, find the weight of the average Sample Y.

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Mathematics