Find the focus and directrix of the parabola with the given equation.x2 = -16y
A. focus: (0, -4)
directrix: y = -4
B. focus: (0, 4)
directrix: y = -4
C. focus: (0, -4)
directrix: y = 4
D. focus: (-8, 0)
directrix: x = 4
Answer: C
Mathematics
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Calculate the area of the surface S. S is the portion of the cone 
+ 
= 
that lies between z = 1 and z = 2.
A. 
B. 
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C. 
?
D. 
?
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Integrate the given expression.
A. 
x3 - 8x2 - 24x + C
B. 8x - 10 + C
C. 4x3 - 10x2 - 24x + C
D. 
x3 - 5x2 - 24x + C
Mathematics
Solve the system of equations algebraically for real values of x and y.
?
?
Please enter your answer as an ordered pair in the form (x, y).
What will be an ideal response?
Mathematics
The two triangles below are similar. Find the missing lengths.
A. x = 28 B. x = 26 C. x = 20 D. x = 35
Mathematics