Checking solutions - PowerPoint PPT Presentation

Algebra 2

Algebra 2. 2.6 Linear Inequalities in Two Variables. Warm-up. Graph the following lines on the same coordinate plane. y = 2 x = -1 -x + y = 1 y = 3x + 1. Learning Targets . Students should be able to… Graph Linear Inequalities in two variables

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Chapter 8.2 Day 1

Chapter 8.2 Day 1. Vocabulary Equation in two variables ex: 2x – 2y = 5 Solution of an equation in x and y is an ordered pair ( x,y ) that produces a true statement when the values x and y are substituted into the equation. Objective 1: checking solutions.

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EXAMPLE 2

–. Tell whether (7, 6) is a solution of x + 3 y = 14. ?. –. 7 + 3( 6 ) = 14. –. Substitute 7 for x and 6 for y. ?. –. 7 + ( 18) = 14. –. 11 = 14. ANSWER. –. The ordered pair (7, 6) is not a solution of x + 3 y = 14. EXAMPLE 2. Checking Solutions.

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