The table shows the number of pens sold at a bookshop last week.
|
Number of pens sold |
Per weekday |
5d |
Saturday |
3d + 40 |
Sunday |
3d - 10 |
- What was the total number of pens sold last week? Express your answer in terms of d the simplest form.
- If d = 27, how many pens were sold on Sunday?
(a)
Total pens sold on weekdays
= 5 x 5
d = 25
d Total pens sold on weekends
= 3
d + 40 + 3
d - 10
= 3
d + 3
d + 40 - 10
= 6
d + 30
Total pens sold last week
= 25
d + 6
d + 30
= 31
d + 30
(b)
Number of pens sold on Sunday
= (3 x 27) - 10
= 81 - 10
= 71
Answer(s): (a) 31
d + 30 or 30 + 31
d ; (b) 71