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Interpret points relative to a system

Problem

Otto has some whipping cream that is 30% butterfat and some milk that is 2% butterfat. He wants to make a 500mL mixture of them that is 12% butterfat.
Here's a graph that shows a system of equations for this scenario where x is the volume of whipping cream he uses and y is the volume of milk he uses.
What does point K represent in this context?
Choose 1 answer:
Stuck?
Stuck?