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If \(x, y,\) and \(k\) are positive numbers such that \(\dfrac{10x}{x+y}+\dfrac{20y}{x+y}=k\) and if \(x < y,\) which of

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If \(x, y,\) and \(k\) are positive numbers such that \(\dfrac{10x}{x+y}+\dfrac{20y}{x+y}=k\) and if \(x < y,\) which of

by Vincen » Thu Mar 18, 2021 12:12 pm

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If \(x, y,\) and \(k\) are positive numbers such that \(\dfrac{10x}{x+y}+\dfrac{20y}{x+y}=k\) and if \(x < y,\) which of the following could be the value of \(k?\)

A. 10
B. 12
C. 15
D. 18
E. 30

Answer: D

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