The table shows the number of notebooks sold at a bookshop last week.
|
Number of notebooks sold |
Per weekday |
5y |
Saturday |
3y + 40 |
Sunday |
3y - 9 |
- What was the total number of notebooks sold last week? Express your answer in terms of y the simplest form.
- If y = 28, how many notebooks were sold on Sunday?
(a)
Total notebooks sold on weekdays
= 5 x 5
y = 25
y Total notebooks sold on weekends
= 3
y + 40 + 3
y - 9
= 3
y + 3
y + 40 - 9
= 6
y + 31
Total notebooks sold last week
= 25
y + 6
y + 31
= 31
y + 31
(b)
Number of notebooks sold on Sunday
= (3 x 28) - 9
= 84 - 9
= 75
Answer(s): (a) 31
y + 31 or 31 + 31
y ; (b) 75