Solve the system.x2 + 4xy + 2y2 = 1x2 - 4xy - 2y2 = 1
A. {(1, 1), (-1, -1), (1, -2), (-1, 2)}
B. {(1, -2), (-1, 2)}
C. {(1, 0), (1, 1)}
D. {(1, 0), (-1, 0), (1, -2), (-1, 2)}
Answer: D
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Find the focus and directrix of the parabola.x = 4y2
A. (0, 1/16); x = 1/16 B. (1/16, 0); x = -1/16 C. (1/4, 0); x = -1/4 D. (0, 1/16); y = -1/16
Find the derivative.p = 
A. 
= sec q tan q
B. 
= sec2 q + 1
C. 
= - csc q cot q
D. 
= sec2 q
A computer password is made up of five characters. Each character can be a capital letter (A through Z) or a digit (0 through 9).How many passwords have three letters and two digits?
A. 263 × 102 B. 10 × 263 × 102 C. 26 × 25 × 24 × 10 × 9 D. 3 × 263 × 102 E. none of these
Solve the problem.A pension fund invests $116,800 in utility stocks and earns 4% per year on the investment. How much money is earned per year?
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