B. 5 cm, 6 cm, 7 cm . because the sum of two sides should be greater then the 3rd side
Answer:

Step-by-step explanation:
Answer:
-7/10
Explanation:
Given the expression

We can rewrite the expression as:

The number line showing the location of the two numbers is attached below. Therefore:
21 hrs. Because if Harry worked one third the hrs thats Aiden worked then 7×3 =21 and 21÷3=7. So 7 is one third of 21.