Simplify the expression.sin(6x - y) cos(x - y) - cos(6x - y) sin(x - y)
A. sin 5x
B. cos 5x
C. sin(7x - 2y)
D. cos(7x - 2y)
Answer: A
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Find the quadratic polynomial y = ax² + bx + c whose graph passes through the points (-2,-16), (-1,-6), and (3,-6).
What will be an ideal response?
Use De Morgan's law to write the negation for the statement.She is not older than 20 and he is older than 20.
A. She is older than 20 but he is not older than 20. B. It is not true that she is older than 20 or he is not older than 20. C. She is older than 20 or he is not older than 20. D. She is older than 20 or he is not younger than 20.
Solve the problem.A woman deposits $447 in the bank, and each month afterward deposits 4% more than the month before. How much did she deposit for the year?
A. $715.66 B. $6028.40 C. $12.48 D. $6716.54
Solve the problem.A flare fired from the bottom of a gorge is visible only when the flare is above the rim. If it is fired with an 
velocity of 144 ft/sec, and the gorge is 320 ft deep, during what interval can the flare be seen? 
A. 8 < t < 9 B. 12 < t < 13 C. 0 < t < 4 D. 4 < t < 5