Question

Select all properties that the set {-1, 1} is closed under.
A. Addition
B. Subtraction
C. Multiplication
D. Division

Select all that apply

Answer 1

help!!!!!!

Answer 2

the set is closed under an operation if the number resulting from that operation is in the set

for example, if 1+(-1) and (-1)+1 are in the set, then it's closed under addition

Answer 3

is it adding and subtraction

Answer 4

why do you think that?

Answer 5

no adding and division

Answer 6

are you just guessing?

Answer 7

no I really don't know this and i have 3 more after this one

Answer 8

how are you supposed to do things you don't know?

Answer 9

I got the rest right except 4 this one