One pen costs $
p. One pencil costs $(
p + 15). One colouring book costs $4
p.
- Cody bought 3 pens, 3 pencils and 1 colouring book. How much did he spend? Simplify your answer in terms of p.
- If p = 11, how much did Cody spend altogether?
(a)
Cost of 3 pens = 3 x
p = $3
p Cost of 3 pencils = 3 x (
p + 15) = $(3
p + 45)
Cost of 1 colouring book = $4
p Total amount that he spent
= 3
p + 3
p + 45 + 4
p= 3
p + 3
p + 4
p + 45
= $(10
p + 45)
(b)
If
p = 11,
total amount that he spent
= 10
p + 45
= (10 x 11) + 45
= 110 + 45
= $155
Answer(s): (a) $(10
p + 45) or $(45 + 10
p); (b) $155