Use identities to simplify the expression.
- tan x
A. - cot x
B. tan x
C. 
D. cot x
Answer: D
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Solve the initial value problem and leave the solution in implicit form.y'(t) = 
, y(0) = 3
A. ln(y3) = ln(t3 + 27) B. y2 = t2 + 9 C. y3 = t3 - 27 D. y3 = t3 + 27
Identify a pattern in the list of numbers. Then use this pattern to find the next number.1, - 
, 
, - 
, 
A. 1/243 B. -1/729 C. 1/729 D. -1/243
Find the expected value of the random variable.The random variable X is the number of people who have a college degree in a randomly selected group of four adults from a particular town. Its probability distribution is given in the table.
A. 1.20 B. 1.44 C. 2.00 D. 1.10
Find the grade point average for a student earning the following grades. Assume 
and 
Round answer to the nearest hundredth.
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A. 3.60
B. 12.00
C. 2.27
D. 3.27