Warm Up

1. Warm Up • An expression that has only numbers and operations is a _______________________ expression. • Simplify . • Simplify . • Simplify . • Which value is equivalent to ?

2. A quick note… • We are officially at MIDTERM! • Parent/Teacher conferences are coming soon (October 2) • If you have a D or an F I will be emailing your parents soon. • If you are getting less than an 80% on homework, you need to make corrections. • Above an 80% (which is a B-) you may choose whether to make corrections. • 24 out of 30 is an 80%

3. Lesson 17, Translating between words and algebraic Expressions Expressions an Equations

5. Example Write an algebraic expression for each phrase. • increased by 12 • The product of and 4 • 8 less than the quotient of and 15 • James is 6 years younger than Lydia, who is years old. Write the expression that shows James’s age.

6. Example Use words to write each algebraic expression in two different ways.

7. Example

8. Example Jayne is saving money to buy a car. She has dollars saved and is saving dollars per week. Write an algebraic expression to represent the total amount of money she will have saved after 52 weeks.

9. Vocabulary • Terms that have the same variable (or variables) raised to the same power are like terms. • We can simplify expressions by combining like terms.

10. Example Simplify each expression.

11. Example Simplify each expression.

12. Example Olympic competition offers three equestrian disciplines: dressage, show jumping, and endurance. The diagram represents the measurements for a regulation dressage arena. Find the perimeter as a simplified variable expression. Then evaluate the expression for meters

13. Correcting Homework • Be kind. • Hold questions until the end. • Write “C.B. ____________” with your name. • If the paper in front of you is not in pencil or black ink hand it back to its owner.

14. Homework • 1st and 2ndhour: Lesson 18 #1-30 • 3rd hour: Lesson 18 #1-30 even