1. Final Exam Review of Expressions

2. Translating expressions
Example: Translate the following sentence to an expression.
Two times a number plus five.
2x + 5

3. Evaluating Expressions
Example: Evaluate the following expressions if x = 7 and y = -3.
1. 3x + y² xy + 5y
3(7) + (-3)²
2(7)(-3) + 5(-3)
21 + 9
-57 30

4. Distribution & Like Terms
Distribution Example: Simplify the following expression.
4(2x – 7)
Like Terms Example: Simplify the following expression.
3x – 9 – 7x + 15
4(2x + -7)
3x x + 15
8x + -28
(3+-7)x + (-9 +15)
4x + 6

5. Adding and Subtracting Linear Expressions
Example: Simplify the following expression.
(7x + 9) – (10x – 19)
(7x + 9) – (10x + -19)
(7x + 9) + (-10x + 19) 7x
+ -10x + 19
-3x + 28