Question

For which operations is the set {–1, 1} closed?

Choose all answers that are correct.

A.
addition

B.
subtraction

C.
multiplication

D.
division

Answer 1

@gibbs

Answer 2

A

Answer 3

can you help me with more?

Answer 4

-1 + 1=2 like sighs add and use that sighn
unlike subtract and use the sighn of the bigger

Answer 5

For which operations is the set {0, 1} closed?

Choose all answers that are correct.

A.
multiplication

B.
division

C.
addition

D.
subtraction

Answer 6

C

Answer 7

but there are multiple answers

Answer 8

C and D

Answer 9

the first one is A and B

Answer 10

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 11

oh whoops one sec

Answer 12

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 13

@gibbs

Answer 14

um they are all corect exept D

Answer 15

Which sets of numbers are closed under subtraction?

Choose all answers that are correct.

A.
odd natural numbers

B.
rational numbers

C.
{0, 1}

D.
{0, 1, 2}

Answer 16

C D

Answer 17

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 18

A B C

Answer 19

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 20

B

Answer 21

@gibbs dude i got 20%

Answer 22

How i googled most of the answeres

Answer 23

. . .