Two times a number plus three times another number equals 13. the sum of the two numbers is 7. what are the numbers?

8 and -1, they add up to thirteen when multiplied by their respective numbers

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's