Which of the following equations have exactly one solution? Choose all answers that apply:
A
-78x + 52 = -52x - 78
B
58x + 52 = -78% - 78
58x + 52 = 78x – 78
52x + 52 = 52x – 78

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?