If xy=4, x/y=16, for positive numbers x and y, y=?
Pick one:
A) 1/2
B) 2
C) 1/3
D) 3
E) 1/6
Very easy question. 2 variables and 2 easy equations.   xy=4 ---&gt; x=4/y - (i)   x/y=16 ---&gt; replacing (i) here ---&gt; 4/(y^2)=16 ---&gt; y^2=4/16=1/4 ---&gt; y=1/2 or -1/2   The question states that x and y are positive integers. Therefore, y=1/2 is the answer.   1/2nswer 1/2.
<result>A</result>
If xy=4, x/y=16, for positive numbers x and y, y=?