Tell whether or not the relation is a function.{(-6, -4), (-6, 9), (1, 1), (6, 4), (9, -9)}
A. No
B. Yes
Answer: A
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Use the given information to find the exact value of the expression.sin ? = 
, ? lies in quadrant II, and cos ? = 
, ? lies in quadrant I
Find sin (? - ?).
A. 
B. 
C. - 
D. 
Solve the equation.
= 5
A. 2 B. 10 C. 7 D. 6
Divide. Express your answer in standard form.
A. 8 + 4i B. -8 + 4i C. 8 - 4i D. -8 - 4i
Find the open intervals where the function is concave upward or concave downward. Find any inflection points.
A. Concave upward on (-?, -1) and (1, ?); concave downward on (-1, 1); inflection points at (-3, -5), (0, -1), and (2, -2) B. Concave upward on (-?, -1) and (2, ?); concave downward on (-1, 2); inflection point at (0, -1) C. Concave upward on (-?, -1) and (1, ?); concave downward on (-1, 1); inflection points at (-1, -3) and (1, -2) D. Concave upward on (-?, -3) and (2, ?); concave downward on (-3, 2); inflection points at (-1, -3) and (1, -2)