Add or subtract by first simplifying each radical and then combining any like radicals. Assume that all variables represent positive numbers.
+ 7
+ 4
A. 63
B. -63
C. -24
D. -98
Answer: A
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For the compound inequality, give the solution set in both interval and graph forms.x - 1 > 1 or x + 1 < 2
A. (-?, 1) ? (2, ?)
B. (1, ?)
C. (-?, -1) ? (2, ?)
D. (-?, 2)
Solve the right triangle ABC with C = 90°. Your answer should give an angle in decimal degrees when given an angle in decimal degrees and in degrees and minutes when given an angle in degrees and minutes. Use the rules for significant digits.a = 723 cm, b = 440 cm
A. c ? 850 cm, A ? 31°, B ? 59° B. c ? 850 cm, A ? 59°, B ? 31° C. c ? 846 cm, A ? 58.7°, B ? 31.3° D. c ? 846 cm, A ? 31.3°, B ? 58.7°
Multiply and simplify.(cos x - sin x)2
A. cos2x + 2 sin2x B. 1 C. 1 - 2 sin x cos x D. cos2x + 2 sin x - sin2x
Write out the terms of the series.
A. 3 + 4 + 5 + 6 B. 6 + 7 + 8 + 9 C. 3 + 4 + 5 + 6 + ... D. 2 + 3 + 4 + 5