math:<

Question 1

it is a well defined group or collection of objects that share common characteristics

Answer 1

sets

Question 2

a set can be described by writing ad description of its elements

Answer 2

descriptive method

Question 3

a set can be described by listing all elements within a pair of braces {}. Each element is separated by a comma.

Answer 3

roster method

Question 4

a set can be described using variables. A variable is a symbol, usually a letter that can represent different elements of a set

Answer 4

set-builder notation

Question 5

must be absolutely clear which object belongs to the set and which does not

Answer 5

well-defined set

Question 6

is the set that contains all objects under consideration

Answer 6

universal set

Question 7

a set with no element

Answer 7

null set

Question 8

is the set containing all elements that are in a or in b

Answer 8

union

Question 9

the set that consists of all elements that are both in A and B

Answer 9

intersection

Question 10

is a set of elements in A that are not in B

Answer 10

difference

Question 11

it is the set of counting numbers, the negative of the counting numbers, and the number zero

Answer 11

integers

Question 12

numbers that can be written as integers, fractions, or decimals

Answer 12

rational numbers

Question 13

numbers that cannot be expressed as a ratio of two integers

Answer 13

irrational numbers

Question 14

can be written with positive sign

Answer 14

positive integers

Question 15

can be written with a negative sign

Answer 15

negative integers

Question 16

is neither a positive nor negative

Answer 16

zero

Question 17

an illustration to show integers

Answer 17

numberline

Question 18

the distance of an integer to zero
can be noted as |x| where in x is an integer

Answer 18

absolute value