Find the standard equation of the parabola that satisfies the given conditions. Vertex: (-4, 0); focus: (-5, 0)
A. (y + 4)2 = -4x
B. x2 = -4(y + 4)
C. y2 = -4(x + 4)
D. (x + 4)2 = -4y
Answer: C
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Suppose you have the following project digraph. (The numbers in parentheses represent hours.)
Using critical-path algorithm to schedule this project with two processors results in a finishing time of
A. 22 hours. B. 19 hours. C. 18 hours. D. 23 hours. E. none of these
Subtract and, if possible, simplify.
x - 
x
A. 
x
B. 
x
C. 
x
D. 
x
Write the ratio in simplest form.Rick ran 2
laps on the track. Debbie ran 3
laps. What was the ratio of laps run by Rick to laps run by Debbie?
A. 
B. 
C. 
D. 
Multiply, and then simplify if possible. Assume all variables represent positive real numbers.(
+ -3)(
+ 3
+ 9)
A. 
+ 6
- 9
+ 3
- 27
B. 3
+ 7
- 9
- 27
C. 3
+ 
+ 6
- 9
- 27
D. 6
- 9
+ 3
+ 
- 27