1. “Don’t judge a book by it’s cover”
“You’re barking up the wrong tree”
“Don’t judge a book by it’s cover”
“You hit the nail on the head”

4. CC5 - Expressions

5. Expressions are mathematical sentences made up of numbers, variables, and operations.
2x + 4y - 9

6. 2x + 4y - 9
Variables

7. 2x + 4y - 9
Coefficients
Variables

8. 2x + 4y - 9
Coefficients
Constant
Variables

9. 2x + 4y - 9 Variables are unknown numbers.
Different variables represent different numbers.
Coefficients
Constant
2x + 4y - 9
Variables

10. 2x + 4y - 9 Coefficients are numbers that are multiplied by variables.
Tells you how many there are of the variable.
Coefficients
Constant
2x + 4y - 9
Variables

11. 2x + 4y - 9 Constants are numbers that never change.
Never multiplied by a variable.
Coefficients
Constant
2x + 4y - 9
Variables

12. Terms are parts of an expression separated by addition or subtraction.
3 Terms: 2x, 4y, -9
Coefficients
Constant
2x + 4y - 9
Variables