algebra chapter 1 Flashcards
A value that does not change
Constant
A letter or symbol used to represent a value that can change
Variable
May contain only constants and/or operations
Numerical expression
May contain variables, constants, and/or operation
Algebraic expression
To find its value
Evaluate
mathematical statement that two expressions are equal
Equation
A value of the variable that makes the equation true
Solution of equation
An equation that is always true no matter what happens to the variable
Identity
Am equation that states a rule for a relationship among quantities
Formula
Equation with two or more variables
Literal equation
A ratio between two sets of measurement
Scale
Scale to represent an object as smaller or larger than the actual object
Scale Drawing
Scale model
Figures have the same shape but not the same size
Similar figures
Two figures are in the same relative position
Corresponding sioooiiiides
In the same relative position
Corresponding angeeeeellllls
Proportion involving similar triangles to find the length that is not easily measured
INDIRECT MEASUREMENT
If every dimension of a figure is multiplied by the same number
Scale factor
Comparison of two quantities by division
Ratio
The closeness of a given measurement or value to the actual measurement or value
Accuracy
A value that does not change
Constant
The ratio of two equal quantities (each measure in different units)
Conversion factor
In the proportion, the products of the means equals the product of the extremes
Cross products
A process that uses rates to convert measurements from one unit to another
Dimensional analysis
The level of detail of a measurement determined by the unit of measurement
Precision
A statement that two ratios are equal
Proportion
A ratio that compares two quantities measured in different units
Rate
The amount by which a measurement is permitted to vary from a specified value
Tolerance
A rate in which the second quantity in the comparison is one unit
Unit rate
