Find the equation of the parabola determined by the given information.Vertex at (5, 4), directrix y = -1
A. x = 
y2 - 
y - 
B. y = 
x2 - 
x - 21
C. x = 
y2 + 10y + 105
D. y = 
x2 - 
x + 
Answer: D
Mathematics
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Find the missing length(s) in the right triangle. If necessary, round to the nearest tenth.
A. b = 11; c = 15.6 B. b = 11; c = 242 C. b = 11; c = 22 D. b = 19.1; c = 22
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Find the value of each square root by use of a calculator. Each number is approximate.
A. 4.3253 B. 5.78050 C. 4.32525 D. 5.7805
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Solve the problem.Find the perimeter.
A. 24k2 + 24x B. 12k2 + 12x C. 24k2 + 12x + 12 D. 12k2 + 6x + 6
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Find the indicated probability.The following table shows the grades of college students in an advanced mathematics course, broken down by year. Use the table below to find the probability that a randomly selected sophomore gets a B. 
A. 
B. 
C. 
D. 
Mathematics