Please help me with this question PLEASE

Need this asap if anyone can i would be very grateful. if you could show workings that would really

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length

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?