Find the difference.-19 - (-47)

A. -28
B. -66
C. 66
D. 28

Answer: D

Mathematics

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Find the focus and directrix of the parabola.y2 - 20x = 0

A. F: (5, 0); D: y = -5 B. F: (5, 0); D: x = -5 C. F: (0, 5); D: y = -5 D. F: (5, 0); D: x = 5

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Write the expression in the standard form a + bi.

A. 4 + 2i
B.  + i
C. 4 - 2i
D.  - i

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Express the rational expression in lowest terms.

A.
B. Already in lowest terms
C. 1
D. -1

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Tell whether the statement is true or false. {5, 10} ? {10, 20, 30}

A. True B. False

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