The table shows the number of pencils sold at a bookshop last week.
| |
Number of pencils sold |
| Per weekday |
6n |
| Saturday |
3n + 40 |
| Sunday |
3n - 10 |
- What was the total number of pencils sold last week? Express your answer in terms of n the simplest form.
- If n = 20, how many pencils were sold on Sunday?
(a)
Total pencils sold on weekdays
= 5 x 6
n = 30
n Total pencils sold on weekends
= 3
n + 40 + 3
n - 10
= 3
n + 3
n + 40 - 10
= 6
n + 30
Total pencils sold last week
= 30
n + 6
n + 30
= 36
n + 30
(b)
Number of pencils sold on Sunday
= (3 x 20) - 10
= 60 - 10
= 50
Answer(s): (a) 36
n + 30 or 30 + 36
n ; (b) 50
