Simple 2 variable integral just want to check my answer

[Daveyboy]

f(x,y)=x+y
region is the triangle with vertices at (0,0) (2,0) (0,1)

I got 1/3

don't have maple handy, could anyone check if this is right?

 

[Mark44]

I get 1.
I'm pretty sure of this answer, because I did this problem in two different ways, and got the same answer both ways.

 

[Daveyboy]

thanks i see it now