SWBAT… take the Algebra I REACH performance task Agenda 1. WU (5 min) 2. Performance Task (30 min) 3. Top Algebra Mistakes (15 min) Warm-Up: 1. Take out HW#4-Writing Expressions - Place in a pile on your desk 2. Take out your pencil & calculator – we are about to take the REACH performance task 3. Look for your name – find your advisory room/teacher for tomorrow (first 20 minutes of your lunch) Top Algebra Mistakes (back of 15 commandments) Tues, 8/21

Agenda 1.WU (5 min) 2.Top Algebra Mistakes (25 min) 3.Review HW#4 – writing expressions 4.Supplies – HW Pass (5 min) SWBAT… write expressions Wed, 8/22 Warm-Up:

HW#4 – Writing Algebraic Expressions Answers 1. 2/3x b/4 3. 2x – /7x 5. 3x + 5x 6. 6(n – 4) 7. x + 4x 8. x/4 + 2 Correct the ones you got wrong on your HW!!! This means you J 2 !

HW#4 – Writing Algebraic Expressions Answers 1. 2/3x b/4 3. 2x – /7x 5. 3x + 5x 6. 6(n – 4) 7. x + 4x 8. x/ A = пr (m + n) = 7n 11. x/4 + 2 = C = 2пr 13. x + x x + 2 = Two times a number plus five 15. Two times the sum of x and 5.

SWBAT… evaluate algebraic expressions Agenda 1. WU (10 min) 2. Evaluating expressions – practice problems & notes (30 min) 3. Work on HW#5 (10 min) Warm-Up: 1.) In your own words, explain what it means to evaluate an expression. 2.) Evaluate 2a when a = ) Evaluate 2a 2 when a = -3. HW#5: Evaluating Expressions Fri, 8/24

A number next to a letter means to ____________ 2 × a = (2)(a) = 2∙a = 2*a = 2a This is a multiplication sign, not the variable x MULTIPLY!!!!!

Directions: Evaluate the following expressions when a = 2, b = 3, and c = ) -2c + ab 2.) a – 2c 3.) 4.) a 2 + c 2 5.)

Expressions – Vocabulary An algebraic expression consists of sums and/or products of numbers and variables.  i.e. x 3 + x 2 3xy 3 + 2xyz – d A term is either a single number or variable, or the product of several numbers or variables separated from another term by a + or – sign The variable term is the term that contains the variables. The constant term is a term that does not have a variable. The coefficient of a term is the numerical part (the number in front or to the left of the variable)

Example: x 2 + 5x – 6 1. Is this an expression or equation? Expression 2. List the terms? x 2, 5x, List the variable terms? x 2, 5x 4. List the constant term? List the coefficients? 1, 5

Example: a 2 – 4a + 3 Algebraic equation or expression: Terms: Variable terms: Constant term: Coefficients: Warning!!! Always take the sign that is in front of the coefficient!

Example: a 2 – 4a + 3 Algebraic equation or expression: expression Terms: a 2, -4a, 3 Variable terms: a 2, -4a Constant term: 3 Coefficients: 1, -4 Warning!!! Always take the sign that is in front of the coefficient!

Exit Slip: Complete on ½ sheet Evaluate the expressions when x = -3 and y = 5 1.) 15 ÷ 5 ● x ● 2y 2.) 2x 2 – x

Supply Check Please take out all of your supplies for a free HW pass.