# alg 2 vocab chapter 1

### 20 terms by summersweethearts

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### evalutating expressions

plug in numbers variables and use order of operations to calculate.

### expression

a variable or combination of variables, numbers, and symbols.

### inequality

compares unequal expressions using one or more of these symbols: <, >, ≥, ≤, ≠

### inverse

the number, that when added or multiplied to, equals zero.

### constant

a symbol representing a value that does not change. ie π

### variable

a letter that is used to represent one or more numbes

### commutative property

changing the order of the operands does not change the end result.

pemdas

### associative property

changing the grouping will not change the end result.

### real number

any number that can be shown on a number line.

### reciprocal

flipping the fraction numbers

### integer

counting numbers, both negative and postive and zero.

### coefficient

the numerical factor in a term containing a variable.

### equation

math sentence with an equal sign

### absoulte value

the distance a number has from zero on a number line. always postive.

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### natural numbers

counting numbers, except zero.

### rationals

terminating or repeating decimals

### irrational numbers

nonterminating
nonrepeating decimals

terminate

Example: