Find the coordinates of the vertex of the quadratic function.f(x) = -7(x - 2)2 - 7
A. (-7, -2)
B. (-7, 2)
C. (2, -7)
D. (-2, -7)
Answer: C
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A formula is given along with the values of all but one of the variables in the formula. Find the value of the variable not given.C = 2?r; C = 12.56, ? = 3.14
A. 15.70 B. 2 C. 4 D. 78.88
What part of the set of objects is shaded?
A. 
B. 
C. 
D. 
Find all values of x in the interval [0°, 360°) that satisfy the equation. Round approximate answers to the nearest tenth of a degree.4 sin4x - 7 sin2x + 3 = 0
A. {0°, 60°, 120°, 180°, 240°, 300°} B. {30°, 90°, 150°, 210°, 270°, 330°} C. {60°, 90°, 120°, 240°, 270°, 300°} D. {60°, 90°, 120°}
Find the focus and the equation of the directrix of the following parabola.x2 + 8x + 4y + 4 = 0
A. Focus (-4, 2), directrix y = 4 B. Focus (0, 2), directrix y = 2 C. Focus (2, 4), directrix y = 6 D. Focus (-4, 1), directrix y = 2 E. Focus (2, 0), directrix y = 4