Solve the quadratic inequality. Express your solution on a number line using interval notation.x2 + 2x ? 8
A. [2, ?)
B. (-?, -4]
C. [-4, 2]
D. (-?, -4] ? [2, ?)
Answer: D
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Use the information below to determine the cardinality of the set. U = {q, r, s, t, u, v, w, x, y, z} A = {q, s, u, w, y} B = {q, s, y, z}n(A ? B)
A. 5 B. 3 C. 6 D. 10
Determine the vertex, focus, and directrix of the parabola and sketch its graph.x2 - 12x = 8y - 68
A. vertex: (6, 4)
focus: (6, 2)
directrix: y = 6
B. vertex: (6, 4)
focus: (4, 4)
directrix: x = 8
C. vertex: (6, 4)
focus: (6, 6)
directrix: y = 2
D. vertex: (6, 4)
focus: (8, 4)
directrix: x = 4
Subtract.-9 - (-8)
A. -17 B. -1 C. 17 D. 1
Write the sample space for the given experiment.A day of the week is selected at random
A. {1, 2, 3, 4, 5, 6, 7} B. {weekend, weekday} C. {Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday} D. 7