1 sticker costs $4.
For every 10 stickers bought, a discount of $3 is given.
- How much do 10 stickers cost?
- How much do 12 stickers cost?
- How much do 29 stickers cost?
(a)
Cost of every 10 stickers
= 10 x 4 - 3
= 40 - 3
= $37
(b)
Number of stickers that do not belong to a set
= 12 ÷ 10
= 1 r 2
Cost of the 2 extra stickers
= 2 x 4
= $8
Cost of 12 stickers
= 37 + 8
= $45
(c)
Number of sets of 10 stickers
= 29 ÷ 10
= 2 r 9
Cost of 20 stickers
= 2 x 37
= $74
Cost of 9 stickers
= 9 x 4
= $36
Cost of 29 stickers
= 74 + 36
= $110
Answer(s): (a) $37; (b) $45; (c) $110