Find all numbers a such that the given point is on the circle x2 + y2 = 1.
A. a = ±
B. a = ±
C. a = ±
D. a = ±
Answer: D
Mathematics
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Solve the equation.Solve 2 tan ? - 4 = 9 for ?, where ? is an acute angle. Approximate ? to the nearest tenth of a degree.
A. 81.3° B. 84.8° C. 42.8° D. 68.2°
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Classify the system as either consistent or inconsistent.
A. Consistent B. Inconsistent
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Graph the hyperbola.
- 
= 1
A. 
B. 
C. 
D. 
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Give the probability distribution and sketch the histogram.The telephone company kept track of the calls for the correct time during a 24-hour period for two weeks. The results are shown in the table.
A. 
B. 
C. 
D. 
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