The table shows the number of notebooks sold at a bookshop last week.
|
Number of notebooks sold |
Per weekday |
5b |
Saturday |
3b + 40 |
Sunday |
3b - 10 |
- What was the total number of notebooks sold last week? Express your answer in terms of b the simplest form.
- If b = 28, how many notebooks were sold on Sunday?
(a)
Total notebooks sold on weekdays
= 5 x 5
b = 25
b Total notebooks sold on weekends
= 3
b + 40 + 3
b - 10
= 3
b + 3
b + 40 - 10
= 6
b + 30
Total notebooks sold last week
= 25
b + 6
b + 30
= 31
b + 30
(b)
Number of notebooks sold on Sunday
= (3 x 28) - 10
= 84 - 10
= 74
Answer(s): (a) 31
b + 30 or 30 + 31
b ; (b) 74