1 sticker costs $8.
For every 10 stickers bought, a discount of $7 is given.
- How much do 10 stickers cost?
- How much do 12 stickers cost?
- How much do 35 stickers cost?
(a)
Cost of every 10 stickers
= 10 x 8 - 7
= 80 - 7
= $73
(b)
Number of stickers that do not belong to a set
= 12 ÷ 10
= 1 r 2
Cost of the 2 extra stickers
= 2 x 8
= $16
Cost of 12 stickers
= 73 + 16
= $89
(c)
Number of sets of 10 stickers
= 35 ÷ 10
= 3 r 5
Cost of 30 stickers
= 3 x 73
= $219
Cost of 5 stickers
= 5 x 8
= $40
Cost of 35 stickers
= 219 + 40
= $259
Answer(s): (a) $73; (b) $89; (c) $259