The table shows the number of files sold at a bookshop last week.
|
Number of files sold |
Per weekday |
6w |
Saturday |
3w + 40 |
Sunday |
3w - 10 |
- What was the total number of files sold last week? Express your answer in terms of w the simplest form.
- If w = 21, how many files were sold on Sunday?
(a)
Total files sold on weekdays
= 5 x 6
w = 30
w Total files sold on weekends
= 3
w + 40 + 3
w - 10
= 3
w + 3
w + 40 - 10
= 6
w + 30
Total files sold last week
= 30
w + 6
w + 30
= 36
w + 30
(b)
Number of files sold on Sunday
= (3 x 21) - 10
= 63 - 10
= 53
Answer(s): (a) 36
w + 30 or 30 + 36
w ; (b) 53