Literal Equations Algebra I Ms. Wiggins

Standards Addressed HSA.CED.A.1: Create equations and inequalities in one variable and use them to solve problems. HSA.CED.A.4: Rearrange formulas to highlight a quantity of interest, using the same reasoning as in solving equations.

Objective Students will be able to rearrange formulas and equations to highlight a quantity of interest by isolating the variable using the same reasoning used to solve equations. Use formulas and equations to solve problems.

Essential Understanding Literal equations are equations with two or more variables. They are solved by re- writing the equation to highlight the variable of interest.

Essential Questions How is rewriting literal equations useful when solving problems? Explain how literal equations and formulas are related. How can you use literal equations to solve problems?

Do Now How would you find the perimeter of the figure below?

Formula for Perimeter 2L + 2W = Perimeter 2(5) + 2(3) = 16 Is this formula a literal equation? A formula is an example of a literal equation

What is a literal equation? A literal equations is a equation with two or more variables. You solve literal equations and formulas by using the same reasoning as used when solving equations by rearranging formulas to highlight a quantity of interest

Vocabulary Isolate Simple interest Variable Formula Literal equations

Example 1

Example 2

Example 3

Example 4

Example 5

Example 6

Example 7

Example 8

Homework

Go to class website view and complete videos and worksheet

Exit Slip Solve the literal equations for x. qt + x = r