If $$\(x\)$$ and $$\(y\)$$ are positive numbers and $$\(x+y=2\)$$ which of the following could be the value of $$\(20 x+50 y ?\)$$
A.
35
B.
65
C.
105
D.
140
Exam No：2020 First Round Grades 10-12 Year：2020 Question No：8
Answer:
B
Knowledge points:
G10-12 - Algebra - Systems of Linear Equations (Manipulation & Modeling)
Solution:
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