Determine whether the relation is a function.

A. A function
B. Not a function


Answer: A

Mathematics

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Find all real numbers in the interval [0, 2?) that satisfy the equation.cos2x + 2 cos x + 1 = 0

A.
B.
C.
D.

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Evaluate.80 - 4 ? 7 + 70 ÷ (-5)

A. 38 B. 518 C. -31 D. -1170

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Solve.A triangular piece of glass is being cut so that the height of the triangle is 4 inches shorter than twice the base. If the area of the triangle is 48 square inches, how long is the height of the triangle?

A. 12 in. B. 14 in. C. 16 in. D. 8 in.

Mathematics

Divide and round to the nearest hundredth.-294.2388 ÷ 9.3

A. -3.16 B. 3.16 C. 31.64 D. -31.64

Mathematics