Mathematics

Gracelyn Coleman

18 May, 21:38

1. Choose the correct solution in roster form.

N is the set of natural numbers that are factors of 12.

A.{1, 2, 3, 4, 6}

B.{1, 2, 3, 4, 6, 12}

C.{1, 2, 3, 4, 5, 6, 8, 12} * this is my answer

D.{1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12}

2. Write the solution to the inequality in set-builder notation.

5r + 8 < 63

A. r

B. r<15

C. r<71

D. r<8

3. Suppose U = {1, 2, 3, 4, 5, 6, 7, 8} is the universal set and P={2, 4, 6, 8}. What is P?

A.{2, 4, 6, 8}

B.{1, 2, 3, 4, 5, 6, 7, 8}

C.{1, 3, 5, 7}

D.{1, 3, 5, 7, 8}

For problems 4-5, use the following information.

Suppose U = {0, 1, 2, 3, 4, 5, 6}, A = {2, 4, 6} and B = {1, 2, 3}. Tell whether each statement is true or false.

4. A U

A. true

B. false

5. B A

A. true

B. false