1. Warm-up
– x = – 23 4 5

2. Homework Questions

3. Chapter 1.4 Rewrite Formulas & Equations

4. Key Terms:
A __________ is an equation that relates two or more quantities , usually represented by variables.
To ____________ means to rewrite an equation as an equivalent equation in which the variable is on one side and does not appear on the other side.

5. Ex. 1 Rewrite a formula with 2 variable

6. You Try it!!

7. Ex. 2 Rewrite the formula in 3 variables
Solve the formula P = 2l + w for w. Then find the width of a rectangle with a length of 12 meters and a perimeter of 41 meters.

8. You Try it!!
2. Solve the formula P = 2l + 2w for l. Then find the length of a rectangle with a width of 7 inches and a perimeter of 30 inches.

9. Ex. 3 Rewrite a Linear Equation

10. You Try it!!
Solve the equation for y. Then find the value of y when x = 2.
y – 6x = 7

11. Ex. 4 Rewrite a nonlinear equation
Solve 2y + xy = 6 for y. Then find the value of y when x = –3.

12. You Try it!!
Solve the equation for y. Then find the value of y when x = 2.
5y – x = 13

13. Ex. 5 Solve a multiple step problem

15. Classwork & Homework
Practice Workbook - Pg ,6,8,9,14, 23 and 25
Textbook – Pg. 30 – , 11,13,21, and 25