Casper has some whipping cream that is 18\%18%18, percent butterfat and some milk that is 4\%4%4, percent butterfat. He wants to make a 500\,\text{mL}500mL500, start text, m, L, end text mixture of them that is 12\%12%12, percent butterfat.
Here's a graph that shows a system of equations for this scenario where xxx is the volume of whipping cream he uses and yyy is the volume of milk he uses.
A graph with two lines and a point. Line A is labeled 0.18 times x plus 0.04 times y equals 0.12 times 500. Line B is labeled x plus y equals 500. Point M is on line B and above line A.
What does point MMM represent in this context?