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Mark is a student, and he
is a student, and he can work for at most 20 hours a week. He needs to earn at least $75 to cover
expenses. His dog-walking job pays $5 per hour and his job as a car wash attendant pays $4 per hour. Write
eds to earn at least $75 to cover his weekly
inequalities to model this situation.
endant pays $4 per hour. Write a system of​