Question

Which equations show that the set of whole numbers is closed under multiplication?

Choose all answers that are correct.

A.
–1 • –1 = 1

B.
0 • –1 = 0

C.
0 • 2 = 0

D.
2 • 1 = 2 a b c

Answer 1

@zepdrix

Answer 2

To show `whole numbers` are closed under `multiplication`
We take `two whole numbers` and `multiply them` to get another whole number.
This illustrates closure.

So we need to `start with` two whole numbers.
-1 is NOT a whole number.

a, b, and c are not necessarily whole numbers, we don't know enough about them.

Answer 3

okay

Answer 4

So we can't pick an option that is showing -1 in the multiplication
and we can't pick the option with a,b and c's and stuff like that.

Answer 5

What does that leave you with? :o

Answer 6

OOHHHHHHHHHHHHHHHHHHH OKAY SO I WAIT WHAT SO D

Answer 7

no :(

Answer 8

;-; WWHATTTTTTTT

Answer 9

b

Answer 10

@zepdrix