Solve the equation. - x - 5 = 0

A. 2i
B. ±2
C. ±4i
D. ±2i


Answer: D

Mathematics

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Solve. = -13

A. 25
B. -5, 5
C.
D. No solution

Mathematics

Find the domain of the rational function.f(x) = 

A. {x|x ? -7, x ? 7, x ? -3} B. {x|x ? 0, x ? 49} C. all real numbers D. {x|x ? -7, x ? 7}

Mathematics

Solve using the simplex method.Find x1 ? 0 and x2 ? 0 such that2x1 + x2 ? 12x1 + 4x2 ? 36and z = 4x1 + 3x2 is maximized.

A. x2 = 9, x1 = 0, z = 39 B. x1 = 12, x2 = 0, z = 48 C. x1 = 32, x2 = 1, z = 131 D. x1 = 36, x2 = 0, z = 144

Mathematics

Find the coefficient of correlation of the line that best fits the data set. ? ?

A.
B. ?
C. ?
D. ?
E. ?

Mathematics