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glen coe pre algebra vocab chapter 1

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evaluate
To find the numerical value of an expression.
solution
A value for the variable that makes an equation true.
For x + 17 = 19, the value is 12
relation
A set of ordered pairs.
algebraic expression
An expressions that contains sums and/or products of variables and numbers.
ordered pair
A pair of numbers used to locate any point on a coordinate plane.
variable
A placeholder for any value.
counterexample
An example that shows a conjecture is not true.
equation
A mathematical sentence that contains an equal sign (=).
origin
The point at which the number lines intersect in a coordinate system.