Solve the problem.If cot ? = -7.1, find the value of cot ? + cot (? + ?) + cot (? + 2?).
A. -21.3 + 3?
B. -19.3
C. -21.3
D. undefined
Answer: C
Mathematics
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Perform the indicated operation and simplify if possible.
A. 
B. 9
C. 3
D. 
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Determine whether the statement is true or false.-11 ? -|-8|
A. True B. False
Mathematics
Determine what kind of function might be used as a model for the data.
A. Quadratic: f(x) = ax2 + bx + c, a > 0 B. Polynomial, but neither quadratic nor linear C. Linear: f(x) = mx + b D. Quadratic: f(x) = ax2 + bx + c, a < 0
Mathematics
Answer the question.What does the digit 4 mean in the number 247,189?
A. 4 hundreds B. 4 hundred thousands C. 4 thousands D. 4 ten thousands
Mathematics