## anonymous one year ago The set {-1,0,1} is not closed under which operation?

1. anonymous

you got any idea what this means?

2. anonymous

Not really, this is completely new to me.

3. anonymous

that is what thought closed under addition for example would mean if you add any two of those you get another one of those

4. anonymous

that is not true, since \(1+1=2\) and \(2\) is not in your set

5. anonymous

it also not closed under multiplication since \(1\div 0\) is not a number

6. anonymous

DIvision or subtraction then?

7. anonymous

addition, not closed division, not closed subtraction, not close since \(-1-1=-2\)

8. anonymous

it is closed under multiplication though

9. anonymous

Multiplication Subtraction Division all of the above is what I have for answers

10. anonymous

hmm the last two, but that is not a choice it is closed under multiplication, not subtraction or division

11. anonymous

Oh no..

12. anonymous

certainly it is not closed under division because you cannot ever divide by zero but it is also not closed under subtraction what is this, some FLVS question?

13. anonymous

Its a stupid question. thats what it is lol Which one would you choose?

14. anonymous

i guess i would choose "division" but it really says "not closed" right?

15. anonymous

if you multiply any two of those you get another one of those for sure

16. anonymous

It does say not closed!

17. anonymous

so it is closed under multiplication don't choose "all of the above"

18. anonymous

ok pick division i guess and write them and tell them it is a mistake on line class?

19. anonymous

Yeah! I'll tell them!

20. anonymous

what system?

21. anonymous

Could you help me with one more?

22. anonymous

sure i can try

23. anonymous

wava k12

24. anonymous

i thought they new better in washington