Find the vertex, focus, and directrix of the parabola with the given equation.(x - 4)2 = -20(y + 1)
A. vertex: (4, -1)
focus: (4, -6)
directrix: y = 4
B. vertex: (4, -1)
focus: (4, 4)
directrix: x = -6
C. vertex: (-1, 4)
focus: (-1, -1)
directrix: y = 9
D. vertex: (-4, 1)
focus: (-4, -4)
directrix: y = 6
Answer: A
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Solve the problem.Midtown Delivery Service delivers packages which cost 
per package to deliver. The fixed cost to run the delivery truck is 
per day. If the company charges 
per package, how many packages must be delivered daily to break even (zero profit)?
A. 76 packages B. 14 packages C. 15 packages D. 23 packages
Factor completely. If the polynomial is prime, state so.20x2 - 60x3 + 45x4
A. prime B. 5x2(3x + 2)2 C. 5x2(3x + 2)(3x - 2) D. 5x2(3x - 2)2
y?? + 2y? + y = 6, y (0) = 3, y?(0) = 1
Solve the initial-value problem.
Solve the equation.
= p - 1
A. 
B. {-5}
C. {4}
D. {5}