One sticker costs $
r. One pencil costs $(
r + 15). One guide book costs $3
r.
- Daniel bought 5 stickers, 3 pencils and 1 guide book. How much did he spend? Simplify your answer in terms of r.
- If r = 13, how much did Daniel spend altogether?
(a)
Cost of 5 stickers = 5 x
r = $5
r Cost of 3 pencils = 3 x (
r + 15) = $(3
r + 45)
Cost of 1 guide book = $3
r Total amount that he spent
= 5
r + 3
r + 45 + 3
r= 5
r + 3
r + 3
r + 45
= $(11
r + 45)
(b)
If
r = 13,
total amount that he spent
= 11
r + 45
= (11 x 13) + 45
= 143 + 45
= $188
Answer(s): (a) $(11
r + 45) or $(45 + 11
r); (b) $188