Jacob wants to buy some pens of the same price. If she buys 9 pens, she will have $6.30 left. If she buys 12 pens, she will have no money left.
- How much does each pen cost?
- How much does Jacob have?
(a)
Cost of 3 pens = $6.30
Cost of each pen
= 6.30 ÷ 3
= $2.10
(b)
Since Jacob will have no money left if she buys 12 pens, the amount that she has is the cost of 12 pens.
Amount that Jacob has
= 12 x 2.10
= $25.20
Answer(s): (a) $2.10; (b) $25.20