3.6 Using Formulas and Literal Equations

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Presentation transcript:

3.6 Using Formulas and Literal Equations Lesson Essential Question: How do formulas help us solve geometric problems and how do we use formulas in everyday life? Objectives -Solve literal equations for a specific variable -Use formulas to solve problems BELLRINGER 1.) 2 (x + 3) = 6 2.) 3 (x - 7) = 2x + 6

A formula is a literal equation that states a rule for a relationship among quantities. Formula Example Simone and her family are going to Europe. Simone does some minor research and finds that in Europe they measure temperature in degrees Celsius. Simone wants to convert 68 Fahrenheit to Celsius using the following formula.. C = 5 (F - 32) 9 Let's try the same with... 32 F and 23 F

Use the same formula and try these three with a partner a.) 50 F b.) 212 F c.) 104 F

Solving For A Variable Let's take a look at the following formula A = P + I A = Total Amount P = Principal (Original Amount) I = Interest a.) Solve this equation for P b.) Solve this equation for I

Working With Formulas Stevie is a member of the FFA and has to do a project where he puts a small fence up to keep his chickens in. The fence has to have a perimeter of 396 linear feet. The pen must have a length that is twice the width. Use the following diagram and the formula for Perimeter to solve the problem. P = 2l + 2w Stevie's Chick Pen

EXIT TICKET A rectangle has a length that is 3 times its width. Use the Perimeter formula to determine the length and width if the perimeter is 32. P = 2l + 2w