Warm-up 1. 9 – x = – 23 4 5.

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Presentation transcript:

Warm-up 1. 9 – x = – 23 4 5

Homework Questions

Chapter 1.4 Rewrite Formulas & Equations

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.

Ex. 1 Rewrite a formula with 2 variable

You Try it!!

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.

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.

Ex. 3 Rewrite a Linear Equation

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

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

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

Ex. 5 Solve a multiple step problem

Classwork & Homework Practice Workbook - Pg. 7 - 8 2,6,8,9,14, 23 and 25 Textbook – Pg. 30 – 31 7-9, 11,13,21, and 25