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Algebra I
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variable
symbol used to represent a number
values of the variable
numbers the variable can equal
domain
set of numbers the variable can equal
variable expression
mathematical expression that names a specific number
simplify a numerical expression
replace the expression with the simplest name for the value
substitution principle
an expression may be replaced by another expression that has the same value
conventions
things we agree to
evaluating a variable expression
means replacing the variable with a specific value then simplifying the resulting numerical expression
order of operations
rules to simplify expressions with more than 2 numbers
grouping symbols
symbols used to show expressions that should be simplified
equation
sentence formed by placing = between 2 expressions
open sentence
an equation containing a variable
statement
a sentence that is either true or false but not both
Formula for Area of rectangle
A=lw length x width
formula for perimeter of rectangle
P=2l + 2w 2 x length + 2 x width
formula for distance traveled
D=rt rate x time traveled
formula for cost
C=np number of items x price of an item
Author
Lee3
ID
167858
Card Set
Algebra I
Description
chapter 1
Updated
2012-08-28T21:52:09Z
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