Melvin plays tennis and swims for a total of 110 minutes every day. He plays tennis 40 minutes more than he swims. Part A: Write a pair of linear equations to show the relationship between the number of minutes Melvin plays tennis (x) and the number of minutes he swims (y) every day.  Part B: How much time does Melvin spend swimming every day?  Part C: Is it possible for Melvin to have spent 70 minutes playing tennis every day? Explain your reasoning.

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