Answer:
14, 28, 42, 56, and 70 are the first 5 common multiples of 14
20, 40, 60, 80, and 100 are the first 4 common multiples of 20
Answer:

Step-by-step explanation:

The formula of perimeter of the rectangle:

Substitute:


Answer:
8
Step-by-step explanation:
it's 8 because the sides facing each other equal