Chapter 1 Section 1 Evaluate expressions

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Presentation transcript:

Chapter 1 Section 1 Evaluate expressions Objective: Students will evaluate algebraic expressions and use exponents. Standard: A.SSE.1 & A.SSE.2

Evaluate Expressions Variable: letter used to represent one or more numbers, ex 3 + x Algebraic expressions: Expression that includes at least one variable, does NOT have an equal sign, ex 3 + x

Evaluate the expression when x = 3 Step 1: Substitute 3 for x 1. 3x = 3 • 3 = 9 2. 6.2 - x = Step 1: Substitute 3 for x 6.2 - 3 = 6.2 - 3.0 3.2

Word Problems 3. The total cost of seeing a movie at a theater can be represented by the expression a + r where a is the cost (in dollars) of admission and r is the cost (in dollars) of refreshments. Suppose you pay $7.50 for admission and $7.25 for refreshments. Find the total cost. Total cost = a + r Write expression. Substitute 7.50 for a and 7.25 for r. Total cost = 7.50 + 7.25 = $14.75

{ 43 = 4 * 4 * 4 Powers exponent base power Product Words Power 4. 95 4. 95 5. n4 Nine to the fifth power 9 ·9 ·9 ·9 ·9 One third to the third power

Evaluate the expression: Step 1: Substitute 4 for x 6. 43 = 4 * 4 * 4 = 64 7. Step 1: Substitute ½ for z (½)4 = ½ * ½ * ½ *½ = 1/16

1.1 HW: Pg. 5-6 1, 3 - 14, 16, 20, 21, 30 - 37, 38 - 40, 44, 45, 46, 48 - 51