Complete the equation so the result is an identity. 
+ tan2x = sec2x
A. cos2x
B. 1
C. -1
D. sin2x
Answer: B
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Find the focus and directrix of the parabola.x2 = -20y
A. (0, -5); x = 5 B. (0, -5); y = 5 C. (-5, 0); y = 5 D. (0, -5); y = -5
Solve the equation 
. Restrict your attention to the horizontal span of 0 to 5. Round your answer to two decimal places if necessary.
??
A. 40.83 B. 39 C. 5.14 D. 3.66
Find the odds.Seven slips of paper marked with the numbers 1, 2, 3, 4, 5, 6, and 7 are placed in a box and mixed well. Two are drawn. What are the odds in favor of the sum of the numbers on the two selected slips is not 6?
A. 9 to 1 B. 19 to 1 C. 21 to 2 D. 19 to 2
Use a proportion to solve the problem.On a map, the length of a nature-center trail is 6.1 centimeters. If the scale is 3 centimeters to 24 kilometers, what is the actual length of the trail?
A. 49.8 kilometers B. 48.8 kilometers C. 97.6 kilometers D. 52.8 kilometers