Word Problem #4: Mary babysits for $4 per hour and tutors for $7 per hour, with a maximum of 13 hours per week and a goal of at least $65. System of inequalities: x + y ≤ 13 and 4x + 7y ≥ 65.
Word Problem #4 showing a math problem about Mary babysitting and tutoring, with variables x and y, and inequalities for hours and money.
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