One sticker costs $
d. One pencil costs $(
d + 15). One story book costs $4
d.
- Harry bought 2 stickers, 3 pencils and 1 story book. How much did he spend? Simplify your answer in terms of d.
- If d = 18, how much did Harry spend altogether?
(a)
Cost of 2 stickers = 2 x
d = $2
d Cost of 3 pencils = 3 x (
d + 15) = $(3
d + 45)
Cost of 1 story book = $4
d Total amount that he spent
= 2
d + 3
d + 45 + 4
d= 2
d + 3
d + 4
d + 45
= $(9
d + 45)
(b)
If
d = 18,
total amount that he spent
= 9
d + 45
= (9 x 18) + 45
= 162 + 45
= $207
Answer(s): (a) $(9
d + 45) or $(45 + 9
d); (b) $207