Given  and , find

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A. 3
B. -3
C. -7
D. 9
E. -11

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Answer: D

Mathematics

Provide an appropriate response.If X is normally distributed with ? = 25 and ? = 5, find P(20 ? X ? 35).

Fill in the blank(s) with the appropriate word(s).

Solve the problem.The number of men dying of AIDS (in thousands) since 1987 is modeled by  where x represents the number of years after 1987. Use this model to predict the number of AIDS deaths among men in 1994. Express answer rounded to the nearest hundred men.

A. 26,000 B. 36,900 C. 25,800 D. 37,000

Graph the parabola. State the vertex of the parabola.y = x2 - 2x - 9

A. vertex (1, -10)

B. vertex (-1, -10)

C. vertex (1, 8)

D. vertex (-1, -8)

Factor completely. If prime, so indicate.18x2 - 63x - 36

A. (18x - 9)(x + 4) B. 9(2x - 1)(x + 4) C. (2x - 1)(9x + 36) D. 9(2x + 1)(x - 4)