1 sticker costs $7.
For every 10 stickers bought, a discount of $4 is given.
- How much do 10 stickers cost?
- How much do 14 stickers cost?
- How much do 24 stickers cost?
(a)
Cost of every 10 stickers
= 10 x 7 - 4
= 70 - 4
= $66
(b)
Number of stickers that do not belong to a set
= 14 ÷ 10
= 1 r 4
Cost of the 4 extra stickers
= 4 x 7
= $28
Cost of 14 stickers
= 66 + 28
= $94
(c)
Number of sets of 10 stickers
= 24 ÷ 10
= 2 r 4
Cost of 20 stickers
= 2 x 66
= $132
Cost of 4 stickers
= 4 x 7
= $28
Cost of 24 stickers
= 132 + 28
= $160
Answer(s): (a) $66; (b) $94; (c) $160