Today, 1. Find your seat. 2. Place your homework in my orange folder

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Presentation transcript:

Today, 1. Find your seat. 2. Place your homework in my orange folder 3. Write your new homework in your agenda 4. Begin the matching exercise on your desk. 5. Match each algebraic expression paper with the verbal expression on the chart.

and you are told, x = 7 Algebra - Moving on Substitution What happens when you are given the numeric value of that mystery number? If you have an expression like: 4x + 7 and you are told, x = 7 What do you do? You substitute in the number 7 for every x. Place the number in brackets.

Practice: a) 5y - 4 (y = 6) b) x + 15 4 (x= 20) c) (a + b)2 (a= 4 b=5)

Simplification What happens if you given an expression which is more complicated... For example, 6a + 8 + 12a - 9 or 4x + 7 - 8x 6xy + 7x2y - 8xy2 - 4xy WE CAN SIMPLIFY THE EXPRESSIONS.

How do we simplify expressions? 1. Identify like terms. 2. Move like terms together. 3. Combine like terms either adding or subtracting. What is a like term? all constants can be combined. They count as like terms. ex. 4x + 7 - 2

Any term with the same variable count as like terms. BUT be careful, The exponents change everything. The exponents must be the same on the same variable. ex. 3x - 6 + 2y + x ex. 4x2 - 1 + 3x3 - 2y2