👉🏼Calculate the distance between (3,8) and (5,0)

👈🏼The mean average of five numbers is 12. Four of the numbers are 7, 2, 15 and 4. Find the fifth number.

👆🏼On the following diagram, is AB the diameter of the circle? Explain your answer:

👇🏼Calculate

🖐🏼What is the length of PR in the following diagram?: