Chapter 1

Question 1

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

Answer 1

absolute value

Question 2

A mathematical sentence containing one or more variables.

Answer 2

Open sentence

Question 3

The graph of a compound inequality containing “or”.

Answer 3

union

Question 4

The graph of a compound inequality containing “and”.

Answer 4

Intersection

Question 5

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

Answer 5

rational number

Question 6

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

Answer 6

solution

Question 7

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

Answer 7

real numbers

Question 8

A mathematical sentence that expresses the relationship between certain quantities.

Answer 8

formula

Question 9

Symbols, usually letters, used to represent unknown quantities.

Answer 9

variables

Question 10

An expression that contains at least one variable.

Answer 10

algebraic expression

Question 11

A mathematical sentence stating that two mathematical expressions are equal.

Answer 11

equation

Question 12

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

Answer 12

compound inequality

Question 13

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

Answer 13

setbuilder notation

Question 14

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

Answer 14

irrational number

Question 15

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

Answer 15

empty set

Question 16

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

Answer 16

interval notation