Lesson plan

Solve a system of equations by substitution

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teaches Common Core State Standards HSA-REI.C.6 http://corestandards.org/Math/Content/HSA/REI/C/6
teaches Common Core State Standards MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards MP5 http://corestandards.org/Math/Practice/MP5
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Big Ideas: You can use substitution when given equations in slope-intercept form to solve a system of equations. Students will look at a context of two friends driving at different rates. They will use substitution to solve a system of equations when it is written in slope-intercept form. This builds off of prior knowledge of writing equations from context and leads to solving a system from that context. Vocabulary: system of equations, substitution Special Materials: none