The table shows the number of pens sold at a bookshop last week.
|
Number of pens sold |
Per weekday |
5k |
Saturday |
3k + 40 |
Sunday |
3k - 7 |
- What was the total number of pens sold last week? Express your answer in terms of k the simplest form.
- If k = 28, how many pens were sold on Sunday?
(a)
Total pens sold on weekdays
= 5 x 5
k = 25
k Total pens sold on weekends
= 3
k + 40 + 3
k - 7
= 3
k + 3
k + 40 - 7
= 6
k + 33
Total pens sold last week
= 25
k + 6
k + 33
= 31
k + 33
(b)
Number of pens sold on Sunday
= (3 x 28) - 7
= 84 - 7
= 77
Answer(s): (a) 31
k + 33 or 33 + 31
k ; (b) 77