3. Which integer represents 12 units at the left of zero? C. -12

5. a integer without sign is a positive integer. A.True

Step-by-step explanation:

Hope it helps.

Questions (3 and 5):

3.) Which integer represents 12 units at the left of zero?

Answer:

A. C

Explanation:

The Left of 0 are negatives, so 12 units to the left is -12.

4.) A integer without sign is a positive integer.

Answer:

B. False

Explanation:

An integer without a sign is 0.