Evaluate the following expression for the given value of the variable.
?
 for
?

A.
B.
C.
D.
E.


Answer: D

Mathematics

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Solve the problem.Suppose that for a particular brand of computer, the average lifespan is 90 months with a standard deviation of 9 months. If a computer lasts for 95 months, what is the z-score for the lifespan of the computer?

A. 0.71 B. 0.56 C. 0.61 D. 0.81

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Solve the inequality.x2 - 9x + 20 > 0

A. x > 5 B. x < 4 or x > 5 C. 4 < x < 5 D. x < 4

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Use Fundamental Identities and/or the Complementary Angle Theorem to find the exact value of the expression. Do not use a calculator.tan 55° - 

A. 0 B. -1 C. 2 D. 1

Mathematics

Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sin ? = - ,   < ? < 2?Find sin(2?).

A. - 
B.
C.
D. - 

Mathematics