Autility company charges $0.14 per kilowatt -hour for energy a customer uses. they give a credit of $0.035 for every kilowatt-hour of electricity a customer with a solar panel generates that they dont use themselves. how many kilowatt-hours did they use?

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?