*Please don't just read the first post and leave. I'm adding to the thread with each attempt. I'm not asking someone to do it for me!* I guess this is a lousy first post, and I apologize, but I am desperate and would appreciate all the help I can get more than anyone could imagine! This is the first problem of the section. I've been sick and haven't made it to any lectures covering this particular material and my final is TOMORROW! Please please help me if you can! 1. The problem statement, all variables and given/known data Evaluate Sc (x + y) ds where C is the straight line segment x=t, y=(1-t), z=0, from (0,1,1) to (1,0,0). 2. Relevant equations 3. The attempt at a solution Kind of both of those together. My text say to integrate a continuous function f(x,y,z) over a curve C: 1. Find a smooth parametrization of C r(t) = g(t)i + h(t)j + k(t)k, t in the interval [a,b] 2. Evaluate the integral as Sc f(x,y,z) ds = bSa f (g(t),h(t),k(t))|v(t)| dt Can someone at least help me get started and try to figure it out myself? The italicized S's are supposed to be integral signs!