Names | Number of tin cans |
Joseph | 3 |
Owen | z |
Stella | 8 + 9 z |
The table shows the number of tin cans collected by 3 students.
- Find the total number of tin cans Joseph, Owen and Stella collected. Express the answer in terms of z in the simplest form.
- If z = 4, find the average number of tin cans the 3 students collected.