1. The problem statement, all variables and given/known data evaluate the integral: int B of z DV where B is the region between the planes: z = x+y, z = 3x+5y and lies over the triangle with vertices (0,0), (0,1), (1,0) 2. Relevant equations 3. The attempt at a solution I'm having some trouble trying to figure out the bounds of the 3d region. I can visualize what it looks like and draw it out by plugging in the points of the triangle into each plane and just drawing the region in between the points.