Pleas help me with this one No.3 No wrong answer or else I’ll report I have test please help me

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?

Simplify the given expression leaving the answer in improper fraction form. 2/3+5/6

What is the interquartile range of this day at set?