One sticker costs $
s. One stapler costs $(
s + 15). One colouring book costs $4
s.
- Xavier bought 3 stickers, 3 staplers and 1 colouring book. How much did he spend? Simplify your answer in terms of s.
- If s = 14, how much did Xavier spend altogether?
(a)
Cost of 3 stickers = 3 x
s = $3
s Cost of 3 staplers = 3 x (
s + 15) = $(3
s + 45)
Cost of 1 colouring book = $4
s Total amount that he spent
= 3
s + 3
s + 45 + 4
s= 3
s + 3
s + 4
s + 45
= $(10
s + 45)
(b)
If
s = 14,
total amount that he spent
= 10
s + 45
= (10 x 14) + 45
= 140 + 45
= $185
Answer(s): (a) $(10
s + 45) or $(45 + 10
s); (b) $185