What is twice 300?

A) 320
B) 302
C) 600
D) 6000
E) 60

C) 600

Mathematics

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Find . Express the answer in standard form.z1 = z2 = 

A. -  - i
B.  + i
C.
D. - i

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Mathematics

Give all solutions of the nonlinear system of equations, including those with nonreal complex components.5x2 + 3xy - 5y2 = -9 x2 - xy - y2 = -5

A. {(-1, -2), (1, 2), (2i, -i), (-2i, i)}
B.
C.
D. {(-1, 2), (1, -2), (2i, i), (-2i, -i)}

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Mathematics

The function Y2 is defined as Y1 + k for some real number k. Based upon the given information about Y1 and Y2, find k.  

A. -6 B. 10 C. -10 D. 6

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Mathematics

Solve the system. 3x - y = 18  2y + z = 12x + 4z = 31

A. (-7, -3, -6) B. (z + 18, -z + 12, z) C. (7, 3, 6) D. No solution

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Mathematics