The table shows the number of notebooks sold at a bookshop last week.
|
Number of notebooks sold |
Per weekday |
5i |
Saturday |
4i + 40 |
Sunday |
3i - 7 |
- What was the total number of notebooks sold last week? Express your answer in terms of i the simplest form.
- If i = 29, how many notebooks were sold on Sunday?
(a)
Total notebooks sold on weekdays
= 5 x 5
i = 25
i Total notebooks sold on weekends
= 4
i + 40 + 3
i - 7
= 4
i + 3
i + 40 - 7
= 7
i + 33
Total notebooks sold last week
= 25
i + 7
i + 33
= 32
i + 33
(b)
Number of notebooks sold on Sunday
= (3 x 29) - 7
= 87 - 7
= 80
Answer(s): (a) 32
i + 33 or 33 + 32
i ; (b) 80