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

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

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

4. 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 =
= $14.75

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

6. 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

7. 1.1 HW:
Pg. 5-6
1, , 16, 20, 21, ,
, 44, 45, 46,