The table shows the number of notebooks sold at a bookshop last week.
| |
Number of notebooks sold |
| Per weekday |
5n |
| Saturday |
4n + 40 |
| Sunday |
3n - 10 |
- What was the total number of notebooks sold last week? Express your answer in terms of n the simplest form.
- If n = 28, how many notebooks were sold on Sunday?
(a)
Total notebooks sold on weekdays
= 5 x 5
n = 25
n Total notebooks sold on weekends
= 4
n + 40 + 3
n - 10
= 4
n + 3
n + 40 - 10
= 7
n + 30
Total notebooks sold last week
= 25
n + 7
n + 30
= 32
n + 30
(b)
Number of notebooks sold on Sunday
= (3 x 28) - 10
= 84 - 10
= 74
Answer(s): (a) 32
n + 30 or 30 + 32
n ; (b) 74
