Mrs Wesley paid a total of $47 for 2
b pens and 4 notebooks. Each pen cost $5.
- Express the cost of 1 notebook in terms of b.
- If b = 3, how much did each notebook cost?
(a)
Total amount spent on 2
b pens
= 2
b x 5
= $10
b Total amount spent on 4 notebooks = $(47 - 10
b)
Total amount spent on 1 notebook = $(
47 - 10b4)
(b)
Price of each notebook if
b = 3
= (47 - 10 x 3) ÷ 4
= (47 - 30) ÷ 4
= 17 ÷ 4
= $4.25
Answer(s): (a) $(
47 - 10b4) or $
47 - 10b4; (b) $4.25