The table shows the number of markers sold at a bookshop last week.
|
Number of markers sold |
Per weekday |
5r |
Saturday |
3r + 40 |
Sunday |
3r - 7 |
- What was the total number of markers sold last week? Express your answer in terms of r the simplest form.
- If r = 28, how many markers were sold on Sunday?
(a)
Total markers sold on weekdays
= 5 x 5
r = 25
r Total markers sold on weekends
= 3
r + 40 + 3
r - 7
= 3
r + 3
r + 40 - 7
= 6
r + 33
Total markers sold last week
= 25
r + 6
r + 33
= 31
r + 33
(b)
Number of markers sold on Sunday
= (3 x 28) - 7
= 84 - 7
= 77
Answer(s): (a) 31
r + 33 or 33 + 31
r ; (b) 77