Solve It! Most numbers on a telephone keypad correspond to a set of letters. Suppose you're friend is using the keypad to encrypt a secret message. He sends you the string of characters 4 6 6 3 in that order. What is one word he might be trying to send?

2

2

10

Problem 1 Got It?

A

B

C

D

3

3

10

Problem 2 Got It?

A

B

C

D

4

10

Problem 3 Got It? What are the subsets of the set P = {a, b}?

Select all that apply.

{} (aka ø or "the empty set")

{a, b}

{a}

{b}

5

10

Problem 3 Got It? What are the subsets of the set S = {a, b, c}?

Select all that apply.

{a, c}

{a, b}

{a, b, c}

{} (aka ø or "the empty set")

{d}

{c}

{a}

{b, c}

{b}

6

5

Problem 3 Got It?Reasoning: Let A = {x | x < -3} and B = {x | x ≤ 0}. Is A a subset of B?

No

Yes

7

10

Problem 3 Got It?Reasoning: Explain your reasoning on the previous item.

8

8

10

Problem 4 Got It?

A

B

C

D

Add to my formatives list

Formative uses cookies to allow us to better understand how the site is used. By continuing to use this site, you consent to the Terms of Service and Privacy Policy.