Question

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

Choose all answers that are correct.

A.
0 + (–1) = –1

B.
1 + 1 = 2

C.
2 + 0 = 2

D.
2 + (–1) = 1

Answer 1

@YoungStudier

Answer 2

lol i was just about to go get lunch then pop

Answer 3

What do you think?

Answer 4

abcd one of those it right XD

Answer 5

LOL

Answer 6

i think c

Answer 7

C and ?

Answer 8

d? i fell like we have done this before

Answer 9

No, lol, not d, but it is C and one other.

Answer 10

a?

Answer 11

I believe so.

Answer 12

transformers now?

Answer 13

Shockwave. ^_^
My fan obsessions change a lot. :P I got bored of being Darth Revan. :PP

Answer 14

#.#

Answer 15

LOL

Answer 16

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 17

What do you think?

Answer 18

b and d

Answer 19

I'm not sure for this one.....