The table shows the number of notebooks sold at a bookshop last week.
|
Number of notebooks sold |
Per weekday |
5i |
Saturday |
3i + 40 |
Sunday |
3i - 10 |
- What was the total number of notebooks sold last week? Express your answer in terms of i the simplest form.
- If i = 26, how many notebooks were sold on Sunday?
(a)
Total notebooks sold on weekdays
= 5 x 5
i = 25
i Total notebooks sold on weekends
= 3
i + 40 + 3
i - 10
= 3
i + 3
i + 40 - 10
= 6
i + 30
Total notebooks sold last week
= 25
i + 6
i + 30
= 31
i + 30
(b)
Number of notebooks sold on Sunday
= (3 x 26) - 10
= 78 - 10
= 68
Answer(s): (a) 31
i + 30 or 30 + 31
i ; (b) 68