Mrs Owen paid a total of $39 for 2
d pencils and 4 notebooks. Each pencil cost $3.
- Express the cost of 1 notebook in terms of d.
- If d = 4, how much did each notebook cost?
(a)
Total amount spent on 2
d pencils
= 2
d x 3
= $6
d Total amount spent on 4 notebooks = $(39 - 6
d)
Total amount spent on 1 notebook = $(
39 - 6d4)
(b)
Price of each notebook if
d = 4
= (39 - 6 x 4) ÷ 4
= (39 - 24) ÷ 4
= 15 ÷ 4
= $3.75
Answer(s): (a) $(
39 - 6d4) or $
39 - 6d4; (b) $3.75