Chapter 1.2, Problem 1PE

Vocabulary and Key Concepts

a. A ______ is a symbol or letter used to represent an unknown number.

b. Values that do not vary are called ______.

c. In mathematics, a well-defined collection of elements is called a _____.

d. The statements $a<b,a>b,\text{ and }a\ne b$ are example of ______.

e. The statement $a<b$ is read as “________”.

f. The statement $c\ge d$ is read as “________”.

g. The statement $5\ne 6$ is read as “________”.

h. Two number that are the same distance from 0 but on opposite sides of 0 on the number line are called ________.

i. The absolute value of a real number, $a$, is denoted by ________ and is the distance between $a$ and _______ on the number line.