Given that x and y are nonnegative integers, compute the number of pairs (x; y) such that
5x + y = 20. Select the correct option:
A) 1  B) 5  C) 10  D) 15  E) 20
For x = 0,1,2,3,4, there is a valid y, giving the answer 5 .   correct answer 5
<result>B</result>
Given that x and y are nonnegative integers, compute the number of pairs (x; y) such that
5x + y = 20.