The table shows the number of pencils sold at a bookshop last week.
|
Number of pencils sold |
Per weekday |
6r |
Saturday |
4r + 40 |
Sunday |
3r - 5 |
- What was the total number of pencils sold last week? Express your answer in terms of r the simplest form.
- If r = 21, how many pencils were sold on Sunday?
(a)
Total pencils sold on weekdays
= 5 x 6
r = 30
r Total pencils sold on weekends
= 4
r + 40 + 3
r - 5
= 4
r + 3
r + 40 - 5
= 7
r + 35
Total pencils sold last week
= 30
r + 7
r + 35
= 37
r + 35
(b)
Number of pencils sold on Sunday
= (3 x 21) - 5
= 63 - 5
= 58
Answer(s): (a) 37
r + 35 or 35 + 37
r ; (b) 58