The table shows the number of notebooks sold at a bookshop last week.
|
Number of notebooks sold |
Per weekday |
5n |
Saturday |
2n + 40 |
Sunday |
3n - 5 |
- What was the total number of notebooks sold last week? Express your answer in terms of n the simplest form.
- If n = 30, how many notebooks were sold on Sunday?
(a)
Total notebooks sold on weekdays
= 5 x 5
n = 25
n Total notebooks sold on weekends
= 2
n + 40 + 3
n - 5
= 2
n + 3
n + 40 - 5
= 5
n + 35
Total notebooks sold last week
= 25
n + 5
n + 35
= 30
n + 35
(b)
Number of notebooks sold on Sunday
= (3 x 30) - 5
= 90 - 5
= 85
Answer(s): (a) 30
n + 35 or 35 + 30
n ; (b) 85