Use the Echelon Method
1. Solve
x + 3y = 7
3x + 4y = 11

What is the area of triangle abc if a = 8, b = 11, and c = 15?

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

Which of the choices shown could be used to prove that aacp=abcp ?