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
Mathematics
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