Mrs Mark paid a total of $45 for 3
s staplers and 4 notebooks. Each stapler cost $3.
- Express the cost of 1 notebook in terms of s.
- If s = 4, how much did each notebook cost?
(a)
Total amount spent on 3
s staplers
= 3
s x 3
= $9
s Total amount spent on 4 notebooks = $(45 - 9
s)
Total amount spent on 1 notebook = $(
45 - 9s4)
(b)
Price of each notebook if
s = 4
= (45 - 9 x 4) ÷ 4
= (45 - 36) ÷ 4
= 9 ÷ 4
= $2.25
Answer(s): (a) $(
45 - 9s4) or $
45 - 9s4; (b) $2.25