Mrs Riordan paid a total of $37 for 3
t pencils and 8 notebooks. Each pencil cost $3.
- Express the cost of 1 notebook in terms of t.
- If t = 3, how much did each notebook cost?
(a)
Total amount spent on 3
t pencils
= 3
t x 3
= $9
t Total amount spent on 8 notebooks = $(37 - 9
t)
Total amount spent on 1 notebook = $(
37 - 9t8)
(b)
Price of each notebook if
t = 3
= (37 - 9 x 3) ÷ 8
= (37 - 27) ÷ 8
= 10 ÷ 8
= $1.25
Answer(s): (a) $(
37 - 9t8) or $
37 - 9t8; (b) $1.25