Names | Number of cardboard |
Alexander | 8 |
Caleb | d |
Gabriel | 4 + 2 d |
The table shows the number of cardboard collected by 3 children.
- Find the total number of cardboard Alexander, Caleb and Gabriel collected. Express the answer in terms of d in the simplest form.
- If d = 9, find the average number of cardboard the 3 children collected.