Warm - Up Name that property: = = Use Distributive Property to find each product: 4. 8(26) 5. 5(31) 6. (22)2

Homework Answers 1.)Associative Property 2.)Identity Property 3.)Commutative Property 4.)Identity Property 5.)Associative Property 6.)Commutative Property 31.) ) ) ) ) ) 80

Using Distributive Property when multiplying two numbers Method 1 (Addition): 7(29) Method 2 (Subtraction): 7(29)

Chapter 1-5 Evaluating Algebraic Expressions

What year were you born? Now use the letter a to represent your age. So when you turn a years old, the year will be (write your birth year) + a Variable: A letter that represents a number that can vary Constant: A number that doesn’t change Algebraic Expression: An expression that contains at least one variable

AgeBirth Year + ageYear at age a (birth year) + a

To evaluate an algebraic expression, substitute a number for the variable. Example 1: The expression.25n helps find the total value of coins in dollars, where n represents the number of quarters. Quarters (n)Expression (.25n)Total (value)

5y - 1 for y = 3for q = 4for p = 2 and t = 1 Evaluate each expression for the given values of the variables