The table shows the number of pencils sold at a bookshop last week.
|
Number of pencils sold |
Per weekday |
5x |
Saturday |
4x + 40 |
Sunday |
3x - 9 |
- What was the total number of pencils sold last week? Express your answer in terms of x the simplest form.
- If x = 21, how many pencils were sold on Sunday?
(a)
Total pencils sold on weekdays
= 5 x 5
x = 25
x Total pencils sold on weekends
= 4
x + 40 + 3
x - 9
= 4
x + 3
x + 40 - 9
= 7
x + 31
Total pencils sold last week
= 25
x + 7
x + 31
= 32
x + 31
(b)
Number of pencils sold on Sunday
= (3 x 21) - 9
= 63 - 9
= 54
Answer(s): (a) 32
x + 31 or 31 + 32
x ; (b) 54