The table shows the number of pens sold at a bookshop last week.
|
Number of pens sold |
Per weekday |
5d |
Saturday |
2d + 40 |
Sunday |
3d - 5 |
- What was the total number of pens sold last week? Express your answer in terms of d the simplest form.
- If d = 21, how many pens were sold on Sunday?
(a)
Total pens sold on weekdays
= 5 x 5
d = 25
d Total pens sold on weekends
= 2
d + 40 + 3
d - 5
= 2
d + 3
d + 40 - 5
= 5
d + 35
Total pens sold last week
= 25
d + 5
d + 35
= 30
d + 35
(b)
Number of pens sold on Sunday
= (3 x 21) - 5
= 63 - 5
= 58
Answer(s): (a) 30
d + 35 or 35 + 30
d ; (b) 58