7.3 Adding Linear Expressions. Linear Expression Algebraic Expression in which the variable is raised to the first power.

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Presentation transcript:

7.3 Adding Linear Expressions

Linear Expression Algebraic Expression in which the variable is raised to the first power.

2 Methods of Adding LE Algebra Tiles (2x+1) + (3x+2) Add like terms using columns (-4x - 1) + (5x - 3) 5x+3 X - 4

Perimeter Add up the side lengths. Perimeter of a rectangle: P= 2L +2 W

Example: A rectangle has side lengths of (5x-1) units and (2x+1) units. a.) Write and simplify a linear expression for the perimeter of the rectangle. P= 2L +2w P= 2 (5x-1) + 2 (2x+1) P= 10x x+2 P= 10x+4x +(-2) +2 P= 14x b.)Find the Perimeter if x= 5.4 units P=14x P= 14 (5.4) P= 75.6 units

Use This Figure a.) Find the Perimeter x + (x+5) + (x+7) b.) Find the Perimeter when x=4 3x+12 P=3x+12 P=3 (4) +12 P=12+12 P=24

Homework Page 307 (1-13,15) all