Find all values of x in the interval [0°, 360°) that satisfy the equation. Round approximate answers to the nearest tenth of a degree.7 cos2x = 5 sin2x
A. {103.2°, 145.2°, 283.2°, 325.2°}
B. {51.8°, 128.2°}
C. {49.8°, 130.2°, 229.8°, 310.2°}
D. {70.5°, 109.5°, 180°}
Answer: C
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Determine whether the argument is valid or invalid.All women are wealthy. Amanda is a woman. Therefore, Amanda is wealthy.
A. Valid B. Invalid
Use the given table or graph to write the inequality described.The sales figures for the Big "D" Company area shown below in a line plot.Use an inequality to compare the sales for July 1989 and July 1990.
A. $46,000 < $64,000 B. $64,000 > $50,000 C. $50,000 < $64,000 D. $48,000 < $58,000
Write as a percent. Round to the nearest tenth of a percent.
A. 178.6% B. 140% C. 17.9% D. 127.6%
Find a polynomial function f(x) of least possible degree having the graph shown.
A. f(x) = 2(x + 2)2(x - 1) B. f(x) = 2(x - 2)2(x + 1) C. f(x) = -2(x - 2)2(x + 1) D. f(x) = -2(x + 2)2(x - 1)