1. Review Use one of the 3 types of applications to solve the system
2x + 3y = 13 2x – 3y = -5

2. 7.5 Special Types of Linear Systems

3. Notes Different solutions of linear systems
Lines intersect (1 solution)
Lines are parallel (no solutions) same slope.
Lines are same (many solutions) same lines.

4. Use linear combination and substitution to solve, tell # of solutions - T
-8x + 8y = -6 3x – 3y = 8

5. Use linear combination and substitution to solve, tell # of solutions - T
-6x – 6y = x – 2y = -4

6. Use linear combination and substitution to solve, tell # of solutions - T
-4x – 2y = 2 4x – 2y = 18

7. Use linear combination and substitution to solve, tell # of solutions - sT
-8x + 8y = -6 3x – 3y = 8

8. Use graphing to find number of solutions-T
Y = 4x + 2
Y = x + 2

9. Use graphing to find number of solutions - t
-3x + y = -1
Y = 3x + 4

10. Use graphing to find the number of solutions - t
2x + 4y = 8
3x + 6y = 12

11. Use graphing to find number of solutions - st
x + y = 3
x – y = -5

12. Wrap up
Questions/Comments
Hw: text pg. 429, #’s: evens, 30

13. Use graphing to Find # of solutions - st
3x + 2y = 8
4y = 16 – 6x

14. Use graphing to Find # of solutions - st
2x + 2y = -8
-x + y = 4