1. Using RREF (Reduced Row Echelon Form)

2. Example: What is the STANDARD FORM for these equations?

3. becomes Now, follow the steps in your packet. What is the solution? Answer: (1, 2) Note the traditional standard form: 3x – y = 1

4. HSA Practice: 1) At a barbecue stand at the city fair, two groups placed the orders shown In the table below. Based on this information, what is the price, in dollars, of a BBQ Platter? Sandwiches PlattersPrice Order A 1 3$23.50 Order B 3 2$25.00 Answer: $6.50

5. 2) At a baseball game, Sam bought 2 hamburgers and 1 order of French fries for a total of $3.75. Erica bought 1 hamburger and 2 orders of French fries for a total of $3.00. Write an equation that represents Sams total cost. Let x = number of hamburgers. Let y = number of French fries. Write an equation that represents Ericas total cost.

6. What is the cost of one hamburger? Answer: $1.50 What is the cost of one order of French fries? Answer: $.75

7. The End