Find the focus and the directrix of the parabola.-2y2 - 12y - 14 - x = 0
A. Focus: 
; directrix: x = 
B. Focus: (-7, 4); directrix: x = -9
C. Focus: 
; directrix: y = 
D. Focus: 
; directrix: x = 
Answer: D
Mathematics
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Determine convergence or divergence of the series.
A. Converges B. Diverges
Mathematics
List the elements in the set .Let U = {q, r, s, t, u, v, w, x, y, z} A = {q, s, u, w, y} B = {q, s, y, z} C = {v, w, x, y, z}. (A' ? C) ? B'
A. {r, t, u, v, w, s, y, z} B. {y, z} C. {r, t, v, w, x} D. {v, x}
Mathematics
Find the sum or difference.2(-2r4 + 9r3 - 3r) - 3(8r4 - 9r3 + 6r2 - 2r)
A. -28r4 + 18r3 - 6r2 - r B. -28r4 + 6r2 - 5r C. -28r4 - 9r3 + 18r2 - 12r D. -28r4 + 45r3 -18r2
Mathematics
Write interval notation.{ x ? -1 ? x ? 3 }
A. [-1, 3] B. (-1, 3] C. (-1, 3) D. [-1, 3)
Mathematics