1. Think about the situations presented in Comp-U-Us and Mowing Lawns. You used two different expressions to model each situation. In Comp-U-Us, one expression you wrote was 1800(x+20). The other expression you wrote was 1800x + 20(1800) or 1800x + 36,000. 1. Are these expressions all equivalent? Do you get the same results from either algebraic expression? How can you determine if they are equivalent? Give an example that illustrates whether the two expressions are equivalent or not. 4-56

2. Think about the situations presented in Comp-U-Us and Mowing Lawns. You used two different expressions to model each situation. In Comp-U-Us, one expression you wrote was 1800(x+20). The other expression you wrote was 1800x + 20(1800) or 1800x + 36,000.

3. 2. Your example above should help to show that The “law” or rule that says that these two expressions are equal is called the Distributive Property. Look at the left side of this equation. Explain what was done to arrive at the right side of the equation.