Calculate.2 ? 92 + 6 ? 1 - 9( 4 + 8)
A. 140
B. -84
C. 222
D. 60
Answer: D
Mathematics
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Graph the function.y = -tan 
A. 
B. 
C. 
D. 
Mathematics
Factor by any method.(p - q)2 + 20(p - q) + 100
A. prime B. (p - q + 10)(p - q - 10) C. (p - q + 10)2 D. (p - q + 100)(p - q)
Mathematics
Determine the period of the given function.y = -2 cos x
A. ?
B. 2?
C. 
D. 2
Mathematics
Solve the problem.Sergio's internet provider charges its customers $15 per month plus 6¢ per minute of on-line usage. Sergio received a bill from the provider covering a 
period and was charged a total of $97.80. How many minutes did he spend on-line during that period? (Round to the nearest whole minute, if necessary.)
A. 1038 min B. 380 min C. 1205 min D. 38 min
Mathematics