Names | Number of plastic bottles |
Harper | 9 |
Risa | t |
Zoe | 5 + 7 t |
The table shows the number of plastic bottles collected by 3 pupils.
- Find the total number of plastic bottles Harper, Risa and Zoe collected. Express the answer in terms of t in the simplest form.
- If t = 8, find the average number of plastic bottles the 3 pupils collected.