Including a 6% sales tax, an inn charges $138.86 per night. Find the inn's nightly cost before tax is added PLEASE HELP BY USING
(100% of x) + (6% of x) = $138.86

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?