PSLE A correction tape costs $5 more than a folder. The total cost of 7 such correction tapes is $5
s.
- Express the cost of 21 such correction tapes in terms of s.
- Express the cost of the folder in terms of s.
(a)
Number of sets of 7 correction tapes in 21 correction tapes
= 21 ÷ 7
= 3
Cost of 21 correction tapes
= 3 x 5
s = $15
s (b)
Cost of a correction tape
= 5
s ÷ 7
= $
5s7 Cost of a folder
=
5s7 - 5
=
5s7 -
357= $(
5s - 357)
Answer(s): (a) $15
s; (b) $(
5s - 357) or $
5s - 357 or $(
5s7 - 5)