Lesson Reasoning in Algebra

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Presentation transcript:

Lesson 2.4 - Reasoning in Algebra “The other day I was driving down the road and saw a banana peel…and swerved. Thank you Mario Kart.”

Properties (on theorem sheet)

Properties (on theorem sheet)

Justifying Steps Example: Solve for x. JUSTIFY each step. Statement Reason 2(x - 3) +12 = 14 Given 2x – 6 + 12 = 14 2x + 6 = 14 2x = 8 x = 4 4

Justifying Steps Example: Solve for x and justify each step. B A x Given: (2x+10) C O Statement Reason x + 2x + 10 = 139 3x + 10 = 139 3x = 129 x = 43

Justifying Steps Example: Solve for m and justify each step Z 2m 5m + 11 Given: XZ = 32 Reason Statement XZ = 32 XY + YZ = XZ 2m + 5m + 11 = 32 7m + 11 = 32 7m = 21 m = 3

Lesson 2.4 - Reasoning in Algebra Homework #8 Pg 97 #2-14 even Pg 105 #1-4, 6-22 even, 28, 29 “The other day I was driving down the road and saw a banana peel…and swerved. Thank you Mario Kart.”