Using the graph of the parabola, determine the coordinates of the vertex and focus, and the equation of the directrix.
A. Vertex (-4, 3), focus (-3, 3), directrix x = -2
B. Vertex (-3, 3), focus (-2, 3), directrix x = -4
C. Vertex (-3, 3), focus (-4, 3), directrix x = -2
D. Vertex (-3, 3), focus (-4, 3), directrix y = -2
Answer: C
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The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = 10 sin t - cos tFind the body's acceleration at time t = ?/4 sec.
A. - 
m/sec2
B. - 
m/sec2
C. 
m/sec2
D. 
m/sec2
Solve the equation in the complex number system.x4 - 2x2 - 3 = 0
A. {
i, i}
B. {- 
, 
, i, -i}
C. {-
i, -i}
D. {
, 3}
Determine whether the system of equations is consistent with independent equations, consistent with dependent equations, or inconsistent.
A. Consistent with independent equations B. Consistent with dependent equations C. Inconsistent
Graph the equation. Identify the coordinates of the vertex.y = x2 - 5x + 1
A. 
B. (0, 1)
C. 
D. (2, -9)