Simplify. 

A.
B.
C.
D.


Answer: A

Mathematics

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Solve the system of equations by the addition method.

A. (, - )
B. (5, 4)
C. (10, 40)
D. no solution

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Solve the problem.At the end of t years, the future value of an investment of $7000 in an account that pays 7% APR compounded monthly is  dollars. Assuming no withdrawals or additional deposits, how long will it take for the investment to reach $21,000? Round to three decimal places.

A. 12.592 years B. 18.888 years C. 23.610 years D. 15.740 years

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Prove the identity.(sin x)(tan x cos x - cot x cos x) = 1 - 2 cos2 x

What will be an ideal response?

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Solve.2(x - 2) = 12x + 2(x2 + 2)

A. x = 2, 1, -4 B. x = -1, -4 C. x = 1, 4 D. x = 2, -1, 4

Mathematics