Chapter 1

Question 2

A number’s distance from zero on a number line.

Answer 2

absolute value

Question 3

A mathematical sentence containing one or more variables.

Answer 3

Open sentence

Question 4

The graph of a compound inequality containing “or”.

Answer 4

union

Question 5

The graph of a compound inequality containing “and”.

Answer 5

Intersection

Question 6

Any number , m/n, where m & n are integers. The decimal form is either a terminating or repeating decimal.

Answer 6

rational number

Question 7

A replacement for the variable in an open sentence that results in a true sentence.

Answer 7

solution

Question 8

All numbers used in everyday life; the set of all rational and irrational numbers.

Answer 8

real numbers

Question 9

A mathematical sentence that expresses the relationship between certain quantities.

Answer 9

formula

Question 10

Symbols, usually letters, used to represent unknown quantities.

Answer 10

variables

Question 11

An expression that contains at least one variable.

Answer 11

algebraic expression

Question 12

A mathematical sentence stating that two mathematical expressions are equal.

Answer 12

equation

Question 13

Two inequalities joined by the word “and” or the word “or”.

Answer 13

compound inequality

Question 14

The expression of the solution set of an inequality, for example {x/x>9}.

Answer 14

setbuilder notation

Question 15

A real number that is not rational. The decimal form neither terminates nor repeats.

Answer 15

irrational number

Question 16

The solution set for an equation that has no solution, symbolized by { } or an “O” with a slash through it.

Answer 16

empty set

Question 17

Using the infinity symbols to indicate the solution set of an inequality is unbounded in the positive or negative direction.

Answer 17

interval notation