Hey look at the pic, and pls tell me if they are equivalent (13-14)

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?

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42

If julia has a value of x5.4 that is equivalent to x10.9 true or false. explain