By using a graphing calculator, the solution set that would be found in the overlapping areas of a graph of Jill's sales is (15, -4).
First of all, we would assign variables to the blend of brownies that were made by Jill for the bake sale as follows:
Since Jill sold more than 11 plates in total, we have:
x + y > 11.
Also, Jill sold less than $66.50 worth of brownies:
5.50x + 4.00y < 66.50.
By using a graphing calculator, the solution set that would be found in the overlapping areas of a graph of Jill's sales is (15, -4).
Read more on graphs here: https://brainly.com/question/21170522
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