Subtract.-6.7 - (-4.3)
A. -11
B. 2.4
C. -2.4
D. 11
Answer: C
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Rewrite each of the following in scientific notation and calculate the answer in scientific notation.
A. 48 × 10-5 B. 48 × 105 C. 8 × 10-4 D. 8 × 104
Simplify the radical expression. Assume that all variables represent positive real numbers.
A. 2 
B. 
C. 4 
D. 2
Find all the complex roots. Leave your answers in polar form with the argument in degrees.The complex cube roots of -8i
A. 2(cos 90° + i sin 90°), 2(cos 210° + i sin 210°), 2(cos 330° + i sin 330°) B. 512(cos 90° + i sin 90°), 512(cos 210° + i sin 210°), 512(cos 330° + i sin 330°) C. 8(cos 90° + i sin 90°), 8(cos 210° + i sin 210°), 8(cos 330° + i sin 330°) D. 2(cos 180° + i sin 180°), 2(cos 300° + i sin 300°), 2(cos 60° + i sin 60°)
Solve using matrices.5x - y + 5z = 163x + 7z = 237y + z = 65
A. (3, 9, 2) B. No Solution C. (3, 2, 9) D. (-3, 9, 6)