Question 198654
A manufacturer of cutlery. They make knives, forks and spoons.
Let spoons be represented in this problem by x. Let forks be represented by y.
Given sets of constraints on forks and spoons, maximize the knives.

Look at this site for a nice tool to draw the plane.
http://www38.wolframalpha.com/input/?i=z%3D5x%2B4y+