The table shows the number of pens sold at a bookshop last week.
|
Number of pens sold |
Per weekday |
6d |
Saturday |
4d + 40 |
Sunday |
3d - 9 |
- What was the total number of pens sold last week? Express your answer in terms of d the simplest form.
- If d = 30, how many pens were sold on Sunday?
(a)
Total pens sold on weekdays
= 5 x 6
d = 30
d Total pens sold on weekends
= 4
d + 40 + 3
d - 9
= 4
d + 3
d + 40 - 9
= 7
d + 31
Total pens sold last week
= 30
d + 7
d + 31
= 37
d + 31
(b)
Number of pens sold on Sunday
= (3 x 30) - 9
= 90 - 9
= 81
Answer(s): (a) 37
d + 31 or 31 + 37
d ; (b) 81