Question

Help please
Find A intersection B.
A: {2, 4, 6, 8, 10, 12}
B: {-2, -1, 2, 4, 7, 11}

{-2, -1, 2, 4, 6, 7, 8, 10, 11, 12}

{1, 4, 7, 11}

{2, 4}

{ }

Answer 1

The intersection is the element that the sets, A and B, have in common.

Answer 2

are the elements*

Answer 3

If S = {positive integers} and subset T = {positive integers divisible by 3}, what is T'?

{3, 6, 9, 12, ...}

{1, 2, 3, 4, 5, ...}

{1, 2, 4, 5, 7, 8, ...}

{ }

Find C intersection D.
C: {3, 6, 9, 12, 15, 18}
D: {numbers divisible by 2 from 1 to 20}

{2, 4, 6, 8, 10, 12, 14, 16, 18, 20}

{6, 12, 18}

{2, 3, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20}

{ }

Which of the following represents the set of integers greater than or equal to -5?

{-5, -6, -7, ...}

{-5, -4, -3, ...}

{-5, -4, -3, ..., 3, 4, 5}

{all positive numbers}

The set O represents the maximum temperatures, in degrees Fahrenheit, recorded in the city of Orlando in a year:

O = {71, 71, 72, 73, 77, 77, 79, 83, 84, 89, 90, 91}

The set T represents the maximum temperatures, in degrees Fahrenheit, recorded in the city of Tampa in a year:

T = {70, 72, 76, 78, 81, 81, 84, 86, 86, 89, 90, 90}

How many elements are in the set O ∪ T?

24

15

5

4

Find B union D.
B: {-2, -1, 1, 4, 7, 12}
D: {numbers divisible by 3 from 1 to 15}

{12}

{-2, -1, 1, 3, 4, 7, 12}

{-2, -1, 1, 3, 4, 6, 7, 9, 12, 15}

{ }

Answer 4

please post 1 question per thread.

Answer 5

i dont understand any of this like i got half of the test
i just want to get this done

Answer 6

right. this site is not for "answers", it's for learning. If you're not interested in that then I'm not sure we can help you.

Answer 7

i know so if you can help me understand these there all confusing please they didnt teach me this in the lesson so i dont understand want there asking

Answer 8

Okay, so the question is:

Find A intersection B.
A: {2, 4, 6, 8, 10, 12}
B: {-2, -1, 2, 4, 7, 11}

{-2, -1, 2, 4, 6, 7, 8, 10, 11, 12}

{1, 4, 7, 11}

{2, 4}

{ }

They are asking "what are the numbers that sets A and B both have"?

so look at the numbers.. the both have "2", what else?

Answer 9

4 so its just what they have in common?

Answer 10

yeah the intersection is what the have in common. in comparison, the union of two sets is the grouping of both sets (without repetition).

Answer 11

okkaay what about the ones that dont give you the other numbers

Answer 12

I'm not sure what you mean, can you post an example?

Answer 13

Find C intersection D.
C: {3, 6, 9, 12, 15, 18}
D: {numbers divisible by 2 from 1 to 20}

{2, 4, 6, 8, 10, 12, 14, 16, 18, 20}

{6, 12, 18}

{2, 3, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20}

{ }

Answer 14

They do give you the numbers.

D: {numbers divisible by 2 from 1 to 20}

this means multiples of 2. so 2, 4, 6, 8, 10.... 18, 20

Answer 15

ohhh okay thanks so much :)

Answer 16

no problem :)