The table shows the number of pens sold at a bookshop last week.
|
Number of pens sold |
Per weekday |
6s |
Saturday |
2s + 40 |
Sunday |
3s - 9 |
- What was the total number of pens sold last week? Express your answer in terms of s the simplest form.
- If s = 21, how many pens were sold on Sunday?
(a)
Total pens sold on weekdays
= 5 x 6
s = 30
s Total pens sold on weekends
= 2
s + 40 + 3
s - 9
= 2
s + 3
s + 40 - 9
= 5
s + 31
Total pens sold last week
= 30
s + 5
s + 31
= 35
s + 31
(b)
Number of pens sold on Sunday
= (3 x 21) - 9
= 63 - 9
= 54
Answer(s): (a) 35
s + 31 or 31 + 35
s ; (b) 54