Here is my first problem -- 1. The problem statement, all variables and given/known data http://img9.imageshack.us/img9/253/picture15lw.png [Broken] 2. Relevant equations I know that I have to set up a matrix and multiply in order to solve this problem. However, I'm having difficulty setting up a matrix. 3. The attempt at a solution x - green squares y - blue squares z - floral squares First, I set up an equation dealing with the price. 3x + 3y + 5z = 558 Then, I set up an equation dealing with the number of squares. x + y + z = 180 (because 15 x 12 would be 180 squares) I know I'm doing something wrong, but I'm not sure what. Any help would be appreciated! Here is my second problem -- 1. The problem statement, all variables and given/known data http://img198.imageshack.us/img198/2711/picture16a.png [Broken] 2. Relevant equations I have this one partially solved, with the correct equations but I don't know how to take it a step further. 3. The attempt at a solution I know that the given variables need to be plugged in, but I'm not sure which equations to use or how to set them up. I have the first part of the problem, but I'm not sure how to apply the equations I have to the second part.