Please help me! I literally have no clue so explanation would be great

What is the area of the triangle 10 13 12

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?

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?