Evaluate the expression.cot(-90°)
A. Undefined
B. 
C. 0
D. -1
Answer: C
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Decide whether the equation is "conditional," an "identity," or a "contradiction." Give its solution set.-8s + 34 + 4(2s - 8) = 0
A. Identity; {all real numbers} B. Conditional; {all real numbers} C. Identity; ? D. Contradiction; ?
Find y ".y = 
4
A. - 
3
B. - 
2 + 
3
C. 12 
2
D. 
2 + 
3
Find the number of elements in the indicated set by referring to the given table.The table below shows the results of a poll taken in a U.S. city in which people are asked which candidate they intend to vote for in an upcoming presidential election. 
Find the number of people in the set R' ? (A ? F)
A. 812 B. 929 C. 1224 D. 295
Find the average.The number of visitors to a historical museum for various days are 67, 79, 51, 75, 48, 79, and 49
A. 56 B. 67 C. 79 D. 64