1. Review of Solving Linear Systems

2. Directions: Answer all questions Show all work (full credit will be only be given to those that show all work) Place name on paper (points will be deducted for “no namers”) Hand paper into Mrs. Krebsbach by the beginning of tomorrow’s class Late papers will be deducted

3. 1.What is a linear system? Extra: What is another name for “a linear system”?

4. 2. How many ways did you learn to solve a linear system? List the ways you learned.

5. 3. Solve the system by graphing. y= -2x y= 5x+3

6. 4. Solve the system by using substitution. Copy the problem onto your paper and show all work 4x+3y = 31 y = 2x+7

7. 5. Solve the system by using substitution. Copy the problem onto your paper and show all work a+½b = 7 3a+2b= 18

8. 6. Describe how you would solve a linear system by using linear combination. (full sentences are expected)

9. 7. Solve the system by using linear combination Copy the problem and show all work. x+7y = 12 -5y + 3x = 10 6.Solve this problem by using linear combination.

10. 8. Solve the system by using the method of your choice. Hint: you will get fractions 3x-5y = -4 7y = 8+9x

11. 9. Compact Disc Sale A store is selling cd’s for $10.50 and $8.50. You buy 10 discs and spend a total of $93. How many cd’s at each price did you buy? a.Write a system of linear equations that describes the situation. b.Solve the system you wrote in part a. Be sure to attach labels.

12. The End! Be sure your name is on your paper and hand it in by the beginning of class time tomorrow! Quiz is tomorrow on 7.1-7.3