The equation y – 9 + 9 = –17 + 9 is an example of which property of equality? a. substitution property of equality b. addition property of equality c. reflexive property of equality d. symmetric property of equality

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?