The table shows the number of notebooks sold at a bookshop last week.
|
Number of notebooks sold |
Per weekday |
5z |
Saturday |
3z + 40 |
Sunday |
3z - 5 |
- What was the total number of notebooks sold last week? Express your answer in terms of z the simplest form.
- If z = 22, how many notebooks were sold on Sunday?
(a)
Total notebooks sold on weekdays
= 5 x 5
z = 25
z Total notebooks sold on weekends
= 3
z + 40 + 3
z - 5
= 3
z + 3
z + 40 - 5
= 6
z + 35
Total notebooks sold last week
= 25
z + 6
z + 35
= 31
z + 35
(b)
Number of notebooks sold on Sunday
= (3 x 22) - 5
= 66 - 5
= 61
Answer(s): (a) 31
z + 35 or 35 + 31
z ; (b) 61