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Algebra Chapter 1

variable a letter or symbol used to represent a value that can change.
coefficient a number multiplied by a variable.
constant a value that does not change
numerical expression may contain only constants and operations
algebraic expression may contain variables, constants, and operations.
power an expression written with an exponent and a base or the value of such an expression.
square root a number that is multiplied by itself to form a product
perfect square a number whose positive square root is a whole number.
natural numbers counting numbers: 1,2,3,...
whole numbers Natural numbers and zero: 0,1,2,3...
integers whole numbers and their opposites: -3, -2, -1, 0, 1, 2, 3....
rational numbers can be expressed in the forms a/b where a and b are both integers and b is not equal to 0.
terminating decimals rational numbers in decimal form that have a finite number of digits.
repeating decimals rational numbers in decimal form that have a block of one or more digits that repeats continuously.
irrational numbers cannot be expressed in the form a/b. They include square roots of whole numbers that are not perfect squares and nonterminating decimals that do not repeat.
additive inverse A number and its opposite. Their sum is zero.
reciprocal Two numbers whose product is 1.
absolute value The distance of the number from zero on a number line.
Created by: galbreath01