If x and y are integers and x=50y + 59, which of the following must be odd?	Choose the correct choice from the following answers: A) xy B) x +2y C) x + y D) 3x-1 E) 3x+1
x = 50y + 59, since y is integer, 50y will always be even hence 50y + 59 will be odd hence x = odd   you don't know whether Y is even or odd, so you need to try.   A: odd * even = even ; odd*odd= odd -&gt;not true   C: odd + odd = even ; odd+even = odd -&gt; not true   B: odd + 2*odd = odd ; odd + 2*even = odd -&gt; TRUE, .   D&amp;E WILL x +2yE EVEN IF X IS ODD   Answer x +2y
<result>B</result>
If x and y are integers and x=50y + 59, which of the following must be odd?