Tenor Chapter 1 Pre-Algebra

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Terms in this set (...)

algebra
A branch of mathematics dealing with symbols.
algebraic expression
An expression that contains sums and/or products of variables and numbers.
coordinate system
A plane that is divided into four regions by a horizontal line called the x-axis and a vertical line called the y-axis that meet at a right angle.
counterexample
An example that shows a conjecture is not true.
deductive reasoning
The process of using facts, properties, or rules to justify reasoning or reach valid conclusions.
defining a variable
Choosing a variable and a quantity for a variable to represent in an equation.
domain
The set of all x-coordinates from each ordered pair in a relation.
equation
A mathematical sentence that contains an equal sign, =.
evaluate
Find the numerical value of an expression.
four-step plan
A plan for problem solving consisting of the steps Understand, Plan, Solve, and Check.
graph
A dot at the point that corresponds to an ordered pair on a coordinate plane.
numerical expression
A combination of numbers and operations.
order of operations
The rules to follow when more than one operation is used in an expression.
ordered pair
A pair of numbers used to locate any point on a coordinate plane.
origin
The point at which the number lines intersect in a coordinate system.
properties
Statements that are true for any number.
range
The set of all y-coordinates from each ordered pair in a relation.
relation
A set of ordered pairs.
simplify
To write an expression in a simpler form.
variable
A placeholder for any value.
x-axis
The horizontal axis of the coordinate plane.
x-coordinate
The first number in an ordered pair.
y-axis
The vertical axis on a coordinate plane.
y-coordinate
The second number in an ordered pair.