Add or subtract the complex numbers(8 + 4i) - (-9 + i)

A. -17 - 3i
B. -1 + 5i
C. 17 + 3i
D. 17 - 3i

Answer: C

Mathematics

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Solve the system of equations.x + 4y + 3z = 11  4y + 4z = 16  z = 3

A. {(-2, 3, 1)} B. {(-2, 1, 3)} C. {(3, 1, -2)} D. ?

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Subtract.

A. 8 B. 5 C. 6 D. 7

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Find the exact value under the given conditions.Given sin ? = - , with ? in quadrant IV, and tan ? = - , with ? in quadrant II. Find cos (? + ?).

A. - 
B.
C.
D.

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Graph the ellipse and locate the foci.4x2 + 9y2 = 36

A. foci at (, 0) and (-, 0)

B. foci at (0, ) and (0, -)

C. foci at (, 0) and (-, 0)

D. foci at (2, 0) and (-2, 0)

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