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NSNguyen
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Q17:
If x, y, and k are positive numbers such that (x/(x+y))(10) + (y/(x+y))(20) = 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
:-/

If x, y, and k are positive numbers such that (x/(x+y))(10) + (y/(x+y))(20) = 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
:-/
Please share your idea and your reasoning 
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