Solve the inequality and graph the solution set.| x | ? 9
A. (-?, -9] ? [9, ?)
B. [-9, 9]
C. (-?, 9]
D. (-?, -9]
Answer: B
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A. 7 B. 0 C. 2 D. undefined slope
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A. -2791 feet B. 2791 feet C. 413 feet D. -361 feet
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A. 
B. 
C. 
D. 
Determine the period of the function and sketch its graph.y = cos 
A. period: 6?
B. period: 3?
C. period: 6?
D. period: 6