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# Algebra 1 Chapter 3

### Mc Dougal Littell

Equivalent Equations Equations with the same solutions as the original equation.
Inverse Operations Operations that undo each other, such as addition and subtraction.
Solution Step The result of applying a transformation to an equation when solving the equation.
Linear Equation in one variable An equation in which the variable is raised to the first power and does not occur in a denominator, inside a square root symbol, or inside an absolute value symbol.
Properties of equality The rules of algebra used to transform equations into equivalent equations.
Ratio of a to b The relationship a/b of two quantities a and b that are measured in the same unit.
Similar Triangles Two triangles are similar if they have equal corresponding angles.
Idenity An equation that is true for all values of the variables.
Round-off error The error produced when a decimal result is rounded in order to provide a meaningful answer.
Formula An algebraic equation that relates two or more real-life quantities.
Rate of a per b The relationship a/b of two quantities a and b that are measured in different units.
Unit Rate A rate per one given unit.
Created by: dhmahlman