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Alg. 2 Chap. 1 Vocab
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Terms in this set (25)
Constant
Values that don't change
Variable Quantities
Values that change
Variable
A symbol (usually a letter) that represents one or more numbers
Numerical Expression
A mathematical phrase that contains numbers and operation symbols
Algebraic Expression
Mathematical phrase that contains numbers, operation symbols, and at least one variable
Opposite
Addition and subtraction
Reciprocal
Flip the fraction
Natural Numbers
Numbers used to count
Whole Numbers
Natural numbers including zero
Integers
Whole numbers and their opposites
Rational Numbers
All numbers that can be written as fractions including integers and repeating and ending decimals
Irrational Numbers
All decimals that never end or repeat
Evaluate
Substitute a number for each variable then simplify using order of operations
Term
Number, variable or a product of both
Coefficient
Number in front of the variable
Constant Term
No variables just a number
Like Terms
Same variables raised to the same power
Equation
A statement that two expressions are equal
Solution of an Equation
Finding all of you values of a variable that make an equation true
Inverse Operations
Operations that "undo" each other
Identity
An equation that is true for every value of the variable.
Literal Equation
An equation that has at least two different variables
Extraneous Solution
an apparent solution that doesn't work in the equation
Compound inequalities
two inequalities are joined by the words "and" or "or"
Absolute Value
distance a number is from 0
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