Into to Algebra Terms
Terms
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 What is a variable?
 a letter or symbol that stands for a number
 Numerical Expression
 an expression that names a particular number
 Variable Expression
 an expression that contains a variable
 Equation
 A mathematical sentence that contains an equal sign
 Open sentence
 a sentence that has one or more variables
 Domain
 a given set of numbers that may repeat a variable
 Solution
 any value of a variable that makes a open sentence true
 solution set
 the set of all solutions to an open sentence
 digits
 numbers 1,2,3,4,5,6,7,8,9
 whole numbers
 0,1,2,3.....
 intergers
 2,1,0,1,2
 real number
 all positive and negative numbers and zero
 graph
 point on a number line
 coordinate
 number paired with a point on a number
 opposites
 numbers and different sides of zero on a number line that same distance from zero
 absolute value
 distance a number is from zero
 What is the Order of Operations

1. Grouping Symbols ()
2. Exponents or Powers
3. Division or Multiplication (Left to Right)
4. Addition or Subtraction (Left to Right)