1. Algebra 1B Sometimes when you innovate, you make mistakes. It is best to admit them quickly, and get on with improving your other innovations so you can be as awesome as me. Mr. Valdez Today:  Class Announcements  Warm-Up  Homework Check/Presentations  Systems Practice  Systems Bingo  Begin Homework

2. BINGO Solve by graphing: y = 2x – 4 x + 2y = 2 (2, 0)

3. BINGO Solve the system by linear combinations: x – 2y = 4 6x + 2y = 10 (2, -1)

4. BINGO Is (3, -6) a solution to the system: x + 3y = 15 4x + y = 6 No

5. BINGO Solve the system by substitution: y = x – 4 4x + y = 26 (6, 2)

6. BINGO Solve the system by any method: -6x + 3y = -6 2x + 6y = 30 (3, 4)

7. BINGO Maria started her savings account with $105. She adds $10 to it each month. Jim started his account with $0 and added $25 to it each month. After how many months will they have the same amount? 7 months

8. BINGO Solve the system by any method: 3y + 4x = 5 x + y = 2 (5, -3)

9. BINGO Solve the system by substitution: x – 2y = -25 3x – y = 0 (5, 15)

10. BINGO Solve the system by linear combinations: 9x + 6y = 3 3y + 6x = 18 (11, -16)

11. BINGO Solve by graphing: 6x – 3y = -15 2x = y = -3 (-2, 1)

12. BINGO You are taking a test worth 250 points. There are 68 questions. Some questions are worth 5 points and the rest are worth 2 points. How many two point questions are on the test? 30 Two Point Questions

13. BINGO Solve the system by any method: 3x + 4y = 9 4y – 3x = -1 (5/3, 1)

14. BINGO Solve the system by linear combinations: 3x + 5y = -16 -2x + 6y = -36 (3, -5)

15. BINGO Solve the system by substitution: 8x + y = 15 9 = 2y + 2x (3/2, 3)

16. BINGO Is (4, 2) a solution to the system: x – y = 2 2x + y = 10 Yes

17. BINGO Solve by graphing: 3x + 6y = 15 -2x + 3y = -3 (3, 1)

18. BINGO Solve the system by linear combinations: 2x + y = -4 4x – 2y = 8 (0, -4)

19. BINGO Theresa has 20 coins that are dimes and quarters. Together they equal $2.75. How many quarters does she have? 5 quarters