Question

Which of the sets shown includes the elements of set Z that are both odd numbers and multiples of 7? Z = {−21, −14, −7, 0, 7, 14, 21}

Answer 1

Answer:

B. {−21, −7, 7, 21}

Step-by-step explanation:

Choices for this question are

A. {−21, 21}

B. {−21, −7, 7, 21}

C. {−14, 0, 14}

D. {−21, −14, −7}

We need to pick a set that has elements of Z and they are odd number and multiples of 7.

Therefore, the right answer is

B. {−21, −7, 7, 21}

Because, this set includes all elements of set Z that are odds and multiples of 7.

The choice A doesn't include -7 and 7, which has to.

Choice C and D includes even numbers.

Answer 2

Answer:

11

Step-by-step explanation:

f 7? Z = {−21, −14, −7, 0, 7, 14, 21}