Algebra-1 VARIABLES AND EXPRESSIONS
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Variable
A letter or symbol used to represent an unknown.
Algebraic Expression
A mathematical expression containing one or more variables.
Expression
A mathematical phrase that cannot be determined true or false.
Constant
A numerical value.
Exponent
The (superscript) number in an exponential expression; it tells how many times a factor is repeated.
Coefficient
The constant preceding the variables in a product.
Base
The number which is repeated as a factor in an exponential expression.