1. Evaluating Algebraic Expressions
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2. Warm Up Write the verbal expression. 5 ÷ b 8(x + 4)
Write the algebraic expression .
3. Four increased by 9
4. The quotient of h and 10
5. The product of 6 and k.
6. 12 less than 20
Possible answers
55 divided by b
8 times the sum of x and 4
4 + 9
h ÷ 10 6k

3. Example 1: Evaluate the expression. 4x + 7 for x = 6
4(6) + 7
Replace the x with the 6 and then use order of operations to solve.
= 31

4. Example 2: Evaluate the expression.
5a + b for a = 4 and b =10
5(4) + 10
= 30

5. Example 3: Evaluate the expression.
4x + 5y – (9 – z) for x = 2, y = 4, and z = 7
4(2) + 5(4) – (9 – 7)
4(2) + 5(4) – (2)
(4) – (2)
– 2
28 – 2 = 26

6. Evaluate each expression. g + 7 – 4 for g = 2 3b – 8 for b = 6
Practice
Evaluate each expression.
g + 7 – 4 for g = 2
3b – 8 for b = 6
6(a + b) – 10 for a = 5 and b = 8
7x + 6 – y + 𝒛 𝟐 for x = 2, y = 4 and z =10 5 68 10
116

7. Closure 3 𝒙 𝟐 + 7y – (z + 8) for x = 3, y = 4, z = 2.
Evaluate the expression.
3 𝒙 𝟐 + 7y – (z + 8) for x = 3, y = 4,
z = 2. 45