Solve the inequality. Express your answer using interval notation. Graph the solution set. < -4

A. (-?, -4) ? (4, ?)

B. (-4, 4)

C. (-?, -4]

D. ?


Answer: D

Mathematics

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Use the fundamental identities and simplify the expression to get a numerical value.cos x (csc x - sec x) - cot x

A. cos2x - tan2x B. 1 C. 0 D. -1

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Find u ? v.u = i + 2j, v = 7i - j

A. 0 B. 9 C. 5 D. -5

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Use the row reduction method to find the inverse of the matrix, if it exists. ? ?

A.
B.
C.
D.
E. The inverse matrix does not exist.

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