1. Algebra I Chapter 6 Review

2. 1) Solve by substitution. y = x – 1 y = -3x - 5
Chapter 6 Review
1) Solve by substitution.
y = x – 1
y = -3x - 5
-5x -4y = 4
6x + 2y = 12

3. Answer 1) Solve by substitution. y = x – 1 y = -3x - 5 -5x -4y = 4
Chapter 6 Review
1) Solve by substitution.
y = x – 1
y = -3x - 5
-5x -4y = 4
6x + 2y = 12
(-1, -2)
(4, -6)

4. 2) Solve by elimination. 5x - 4y = -3 3x - 4y = -5 3y = 4x - 12
Chapter 6 Review
2) Solve by elimination.
5x - 4y = -3
3x - 4y = -5
3y = 4x - 12
3x - 2y = 9

5. Answer 2) Solve by elimination. 5x - 4y = -3 3x - 4y = -5 3y = 4x - 12
Chapter 6 Review
2) Solve by elimination.
5x - 4y = -3
3x - 4y = -5
3y = 4x - 12
3x - 2y = 9
(1, 2)
(3, 0)

6. 3) Solve by graphing. -5x - 4y = 4 3x + y = 6
Chapter 6 Review
3) Solve by graphing.
-5x - 4y = 4
3x + y = 6

7. 3) Solve by graphing. -5x - 4y = 4 3x + y = 6
Answer
Chapter 6 Review
3) Solve by graphing.
-5x - 4y = 4
3x + y = 6 y 5
-5x - 4y = 4
-4y = 5x + 4
y = -5/4 x -1 x -5 5
(4, -6)
3x + y = 6
y = -3x + 6 -5

8. Chapter 6 Review
4) Solve.
y < 3x - 4
y ≥ x - 1

9. Answer 4) Solve. y < 3x - 4 y ≥ x - 1 Chapter 6 Review y x 5 -5 5

10. Chapter 6 Review
5) Solve.
y = │x│ - 1
y = x2 - 3

11. Answer 5) Solve. y = │x│ - 1 y = x2 - 3 Chapter 6 Review (-2, 1)
(2, 1) x -5 5 -5

12. You have 10 coins that total $0.42.
Chapter 6 Review
6) Solve.
You have 10 coins that total $0.42.
Some are nickels, the rest pennies.
How many of each type are there?

13. Answer 6) Solve. You have 10 coins that total $0.42.
Chapter 6 Review
6) Solve.
You have 10 coins that total $0.42.
Some are nickels, the rest pennies.
How many of each type are there?
2 pennies and 8 nickels

14. Chapter 6 Review
7) Solve.
An orchestra consists of string instruments and wind instruments in a ratio of 9 to 4. There are 91 total instruments. How many of each instrument are there?

15. Answer
Chapter 6 Review
7) Solve.
An orchestra consists of string instruments and wind instruments in a ratio of 9 to 4. There are 91 total instruments. How many of each instrument are there?
28 wind and 63 string