The table shows the number of pens sold at a bookshop last week.
| |
Number of pens sold |
| Per weekday |
5k |
| Saturday |
3k + 40 |
| Sunday |
3k - 8 |
- What was the total number of pens sold last week? Express your answer in terms of k the simplest form.
- If k = 21, how many pens were sold on Sunday?
(a)
Total pens sold on weekdays
= 5 x 5
k = 25
k Total pens sold on weekends
= 3
k + 40 + 3
k - 8
= 3
k + 3
k + 40 - 8
= 6
k + 32
Total pens sold last week
= 25
k + 6
k + 32
= 31
k + 32
(b)
Number of pens sold on Sunday
= (3 x 21) - 8
= 63 - 8
= 55
Answer(s): (a) 31
k + 32 or 32 + 31
k ; (b) 55
