Find the vertex, the focus, and the directrix of the parabola.y = -2x2 - 8x - 12 = 0
A. V: 
; F: (-2, -6); D: x = -2
B. V: (-2, -4); F: 
; D: y = - 
C. V: 
; F: (-2, -12); D: x = -4
D. V: 
; F: 
; D: x = - 
Answer: B
Mathematics
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Multiply and simplify.
? 3b
A. 
b
B. 
C. 
D. 11b
Mathematics
Use Gauss-Jordan elimination to find the solution. Write the solution as an ordered triple.-5x - y + 8z = 28-4x + 7y - 2z = 35-9x - 5y + z = -39
A. (1, 7, 5) B. (-1, 5, 7) C. (1, 5, 7) D. (-1, 7, 2)
Mathematics
Evaluate the integral.
Mathematics
Perform the indicated operation.(m - 3)(7m2 + m + 8)
A. 7m3 - 20m2 + 5m - 24 B. 7m3 - 20m2 + 11m - 24 C. 7m3 - 22m2 + 5m - 24 D. 7m3 + 20m2 + 5m - 24
Mathematics