If xy = 5 and x^2 + y^2 = 20, then x/y + y/x =  Choose the correct choice from the following choices.
A) 2 2/5
B) 3 1/7
C) 5 1/3
D) 4
E) 60
x/y+y/x=(x^2+y^2)/xy =substitute given we get 20/5= 
<gadget id="calculator">20/5</gadget>
<output>4</output>
4 answer 4
<result>D</result>
If xy = 5 and x^2 + y^2 = 20, then x/y + y/x =