Melvin plays tennis and swims for a total of 110 minutes every day. he plays tennis for 40 minutes longer 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. (5 points)

part b: how much time does melvin spend swimming every day? show your work. (3 points)

part c: is it possible for melvin to have spent 70 minutes playing tennis if he plays and swims for a total of exactly 110 minutes and plays tennis for 40 minutes longer than he swims? explain your reasoning. (2 points)