Find an equation of variation in which y varies inversely as x and the following is true.y = 9, when x = 15

A. y = 
B. y = 135x
C. y = 
D. y = 


Answer: A

Mathematics

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Determine whether the set is well defined or not well defined. The set of rivers that flow south to north

A. well defined B. not well defined

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Use the given triangles to evaluate the expression. Rationalize all denominators. cot 

A.
B. 1
C.
D.

Mathematics

Factor completely.-2r2 + 15rt - 7t2

A. (2r - t)(r - 7t) B. -1(2r - t)(r - 7t) C. -1(2r + t)(r - 7t) D. -1(2r + t)(r + 7t)

Mathematics

Describe the solution set as an inequality and in interval notation. |0.3x - 1.2 | ? 1.8

A. -10 ? x ? 2; [-10, 2] B. x ? -10 or x ? 2; (-?, -10] ? [2, ?) C. x ? - 2 or x ? 10; (-?, - 2] ? [10, ?) D. - 2 ? x ? 10; [- 2, 10]

Mathematics