Answer:
Let x be the number of hamburgers that Indigo bought, and let y be the number of drinks that she bought.
Then we can write the following system of equations to represent the given information:
5.5x + 2.25y = 42 (the total cost of hamburgers and drinks is $42)
x + y = 10 (the total number of hamburgers and drinks is 10)
These two equations together form a system that can be solved to determine the number of hamburgers and drinks that Indigo bought.
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