Question

Will give medal
Which sets of numbers are closed under addition?

Choose all answers that are correct.

A.
{0, 2, 5, 8}

B.
even integers

C.
rational numbers

D.
{0}

Answer 1

can you help

Answer 2

@abb0t

Answer 3

i think one of thems D

Answer 4

i would say Band C

Answer 5

Opps B and C

Answer 6

SO IT WOULD BE B AND C

Answer 7

Ya i think so

Answer 8

B,C, and D.

0+0=0

So {0} is closed under addition.

Answer 9

So be B C AND D

Answer 10

Yep

Answer 11

oK THANK YOU CAN YOU HELP ME WITH SOME MORE

Answer 12

sure

Answer 13

lol i got d right hahaha

Answer 14

Numbers p and q are positive integers.

Which statements are always true?

Choose all answers that are correct.

A.
p + q is a positive integer

B.
p – q is a negative integer

C.
p • q is a positive integer

D.
is a positive integer

Answer 15

If you refresh it will work

Answer 16

What do you think?

Answer 17

A and c

Answer 18

Right.

Answer 19

D is p/q ? I only see "is a positive integer"

Answer 20

Here the next one wait it is p/p is a positive integer that stands for fraction

Answer 21

@geerky42

Answer 22

That one is d

Answer 23

p/p ?

Answer 24

Then D is answer, because p/p is always 1, hence always positive integer.

Answer 25

yeah but like a fraction

Answer 26

Om thanks here is the last one

Answer 27

Is the set of multiples of 5 closed under division? Explain why or provide a counterexample if not.

A.
Yes, because the quotient of any two multiples of 5 is also a multiple of 5.

B.
Yes, because the quotient of any two multiples of 5 is also a multiple of 10.

C.
No, and a counterexample is 100 ÷ 5 = 20.

D.
No, and a counterexample is 25 ÷ 50 = .

Answer 28

@geerky42

Answer 29

What do you think?

Answer 30

on de there is a fraction of 1/2 as the answer

Answer 31

Yeah, D

Answer 32

I think it is b

Answer 33

But it is d

Answer 34

Are you there

Answer 35

Set of multiples of 5 = \(\{\ldots, -10, -5, 0, 5, 10,15,\ldots\}\)

\(\dfrac{25}{50} = \dfrac{1}{2}\), right?

Is 1/2 in set of multiples of 5?

Answer 36

yes it is 25 divided by 50

Answer 37

It is equal to 1/2

Is 1/2 divisible by 5?

Answer 38

Uh I dont think so

Answer 39

No, so since we can select two elements from set and produce new number that is not in set, this set is not closed under division, so answer is D.

Answer 40

Does that make sense?

Answer 41

So what do you think it is

Answer 42

And yes it does

Answer 43

Okay

Answer 44

Thank you so much