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Tools of Algebra

Across
When you substitute numbers for the variables in an exppression.
Expression that contains one or more variables.
Of any nonzero number a is 1/a. The product is 1.
Its distance from zero on the number line and distance is nonnegative.
Down
Is a number, a variable, or the product of a number and one or more variables.
Symbol, usually a letter.
Any number a is -a. The sum of opposites is 0.
The numerical factor in a term.
When actual trials are difficult to conduct, you can find experimental probabilities.
Equals one half of the distance between the maximum and minimum values.
Set of all possible outcomes.