Day 8
1. Opener
Solve using any method:
a)
3x + y = !2
5x ! y = !10
b)
4x + 2y = 58
4x ! 3y = 18
c) What is the world’s most consumed fruit?
2. Solving Linear Systems using Elimination
2x + 5y = 17
7x + 2y = 10
3x + 2y = −19
6x − 5y = −9
7x − 5y = 24
5x − 2y = 59
8x + 11y = 20
2x + 18y = −9
20x + 3y = 20
5x − 11y = −59
4x + 18y = −27
−20x + 5y = 60
2. Solving Linear Systems using Elimination
(1, 3)
(2, -2)
(5, -17)
(-3, 4)
(-9, 0.5)
(-0.5, 10)
2. Solving Linear Systems using Elimination
3. Equivalent Linear Systems
3. Equivalent Linear Systems
3. Equivalent Linear Systems
3. Equivalent Linear Systems
3x + 4y = !6
x2=
6x + 8y = −12
x3=
9x + 12y = −18
4. Solving Linear Systems using __________
3x − 4y = 3
2x + 2y = −12
4. Solving Linear Systems using __________
4x + 3y = 15
8x ! 9y = 15
4. Solving Linear Systems using __________
3x = 2 − 3y
5x = 3 − 2y
5. Homework
Practice
Solve the linear system:
x + 2y = −3
2x + 3y = −4
Challenge
Solve the linear system:
3s + 4 = !4t
7s + 6t + 11 = 0