The table shows the number of pencils sold at a bookshop last week.
|
Number of pencils sold |
Per weekday |
5d |
Saturday |
2d + 40 |
Sunday |
3d - 10 |
- What was the total number of pencils sold last week? Express your answer in terms of d the simplest form.
- If d = 21, how many pencils were sold on Sunday?
(a)
Total pencils sold on weekdays
= 5 x 5
d = 25
d Total pencils sold on weekends
= 2
d + 40 + 3
d - 10
= 2
d + 3
d + 40 - 10
= 5
d + 30
Total pencils sold last week
= 25
d + 5
d + 30
= 30
d + 30
(b)
Number of pencils sold on Sunday
= (3 x 21) - 10
= 63 - 10
= 53
Answer(s): (a) 30
d + 30 or 30 + 30
d ; (b) 53