a letter or symbol that stands in the place of a number
a number sentence using at least one variable and sometimes numbers and operation symbols
no equals sign
you _____ an expression; when _____ a variable expression you replace the variable with a number then use order of operations to simplify
you _____ an equation
two numbers the same distance away from zero, on opposite sides of the zero sign
(natural) counting numbers
1, 2, 3...
0, 1, 2, 3...
a set of whole numbers and their opposites
the distance a number is from zero
making a conclusion based on patterns you observe
a conclusion you reach by inductive reasoning
an example that contradicts a conjecture
data value(s) that are much larger or smaller than the rest of the data set
the sum all the numbers divided by the number of data items
the data that falls right in the middle of the data, when they are arranged in order from least to greatest
the number that occurs most often in a data set
a data set can have more than one
the difference between the smallest and largest value in a data set
a group from which you want information
a part of a population used to make an estimate about the whole population
a sample where each member of a population has an equal chance to be selected
commutative prop. of add. and mult.
the answer to an equation does not change if numbers in an equation are switched
associative prop. of add. and mult.
changing the grouping in an equation will not change the answer
identity prop. of add. and mult.
the sum of a number and 0 is equal to that number,
product of a number times 1 is equal to that number
a number or the product of a number and a variable
a term that has no variables
two numbers that have identical variables
a number that multiplies a variable
a value(s) of the variable that makes the equation or inequality a true statement
a mathematical statement in which two equations are equal
any mathematical sentence that contains the symbols:
<, >, _< (greater than or equal to), _> (smaller than or equal to), or =
an equation that shows a relationship between quantities that are represented by variables
the metric system