The table shows the number of files sold at a bookshop last week.
|
Number of files sold |
Per weekday |
5j |
Saturday |
2j + 40 |
Sunday |
3j - 10 |
- What was the total number of files sold last week? Express your answer in terms of j the simplest form.
- If j = 24, how many files were sold on Sunday?
(a)
Total files sold on weekdays
= 5 x 5
j = 25
j Total files sold on weekends
= 2
j + 40 + 3
j - 10
= 2
j + 3
j + 40 - 10
= 5
j + 30
Total files sold last week
= 25
j + 5
j + 30
= 30
j + 30
(b)
Number of files sold on Sunday
= (3 x 24) - 10
= 72 - 10
= 62
Answer(s): (a) 30
j + 30 or 30 + 30
j ; (b) 62