The table shows the number of pencils sold at a bookshop last week.
|
Number of pencils sold |
Per weekday |
5i |
Saturday |
4i + 40 |
Sunday |
3i - 10 |
- What was the total number of pencils sold last week? Express your answer in terms of i the simplest form.
- If i = 20, how many pencils were sold on Sunday?
(a)
Total pencils sold on weekdays
= 5 x 5
i = 25
i Total pencils sold on weekends
= 4
i + 40 + 3
i - 10
= 4
i + 3
i + 40 - 10
= 7
i + 30
Total pencils sold last week
= 25
i + 7
i + 30
= 32
i + 30
(b)
Number of pencils sold on Sunday
= (3 x 20) - 10
= 60 - 10
= 50
Answer(s): (a) 32
i + 30 or 30 + 32
i ; (b) 50