Write the expression in interval notation. Graph the interval.x < 1

A. (1, ?)

B. (-?, 1)

C. [-?, 1)

D. (-?, 1]

Answer: B

Mathematics

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Factor completely.9x2 - 3xt - 2t2

A. (9x + t)(x - 2t) B. (3x + t)(3x - 2t) C. Prime D. (3x - t)(3x + 2t)

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Graph the function.f(x) = 3x

A.

B.

C.

D.

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Decide whether the equation describes a function.x = -9

A. yes B. no

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Evaluate the required second order partial derivative.Find fxy(2, 5), if f(x, y) = -5x3y2 + 2x4 + 5xy3.

A. -840 B. -1570 C. -1440 D. -225

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