Apologies for this being a kind of stupid question... 1. The problem statement, all variables and given/known data Describe each plane (a) [tex]8x-5y=-40z[/tex] 2. Relevant equations Probably have to find the x, y, and z intercepts. 3. The attempt at a solution I would assume that in order to find the x intercept you set y and z equal to zero. And the same idea for the other two. THe answer that I got was (0, 0, 0). Am I doing this wrong?