Definitions
numbers and operations
Numerical Expression
9 + 7x - 11 - 12x
-5x - 2
9 + 7x - 11 - 12x
-5x - 2
Is this an expression or equation
x + 31y = 5
Equation
|-23 + 3|
20
numbers, operations and variables
Algebraic Expression
6n + 3n - 5m + 12 + 9m
4m + 9n +12
10 + 2b + 8b - 6
10b + 4
These are terms that have the same variables
Like Terms
|2x-5|, when x =0.5
4
A number without a variable.
Constant
2y+6x+12+4y-18y
6x -12y + 12
4x - 3x + 2x + 12 - 19
3x - 7
The number before the variable
Coefficient
|6y + 4|, when y= -2
8
A word used for the letters that are used to represent an unknown quantity.
Variable
n − 10 + 9n − 3
10n -13
(3x - 4) + (-2x - 9)
x - 13
Simplifying The Expression
|12-2t|, when t =-2
16
The type of math where numbers and symbols are used to formulate expressions and equations.
Algebra
19q - 15 - 2q - 10 + 10x - 4y + 11x + 3y - 2
17q + 21x - y - 27
(5x - 4) + (9x + 5)
14x + 1
The rule that lets you know which operations to perform first.
Order of Operations. (PEMDAS)
15 - |2 - 3s|, when s = 2
11