Isaac wants to buy some files of the same price. If she buys 8 files, she will have $7.80 left. If she buys 11 files, she will have no money left.
- How much does each file cost?
- How much does Isaac have?
(a)
Cost of 3 files = $7.80
Cost of each file
= 7.80 ÷ 3
= $2.60
(b)
Since Isaac will have no money left if she buys 11 files, the amount that she has is the cost of 11 files.
Amount that Isaac has
= 11 x 2.60
= $28.60
Answer(s): (a) $2.60; (b) $28.60