The table shows the number of pens sold at a bookshop last week.
| |
Number of pens sold |
| Per weekday |
6r |
| Saturday |
3r + 40 |
| Sunday |
3r - 5 |
- What was the total number of pens sold last week? Express your answer in terms of r the simplest form.
- If r = 23, how many pens were sold on Sunday?
(a)
Total pens sold on weekdays
= 5 x 6
r = 30
r Total pens sold on weekends
= 3
r + 40 + 3
r - 5
= 3
r + 3
r + 40 - 5
= 6
r + 35
Total pens sold last week
= 30
r + 6
r + 35
= 36
r + 35
(b)
Number of pens sold on Sunday
= (3 x 23) - 5
= 69 - 5
= 64
Answer(s): (a) 36
r + 35 or 35 + 36
r ; (b) 64
