Mrs Cole paid a total of $50 for 2
z files and 8 notebooks. Each file cost $5.
- Express the cost of 1 notebook in terms of z.
- If z = 4, how much did each notebook cost?
(a)
Total amount spent on 2
z files
= 2
z x 5
= $10
z Total amount spent on 8 notebooks = $(50 - 10
z)
Total amount spent on 1 notebook = $(
50 - 10z8)
(b)
Price of each notebook if
z = 4
= (50 - 10 x 4) ÷ 8
= (50 - 40) ÷ 8
= 10 ÷ 8
= $1.25
Answer(s): (a) $(
50 - 10z8) or $
50 - 10z8; (b) $1.25