URGENT HELP PLEASE! :((( There are 6 true false questions about sets, please explain why false or true shortly.

Which best explains why this triangle is or is not a right triangle?

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?

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?