Isaac wants to buy some pencils of the same price. If she buys 5 pencils, she will have $4.10 left. If she buys 7 pencils, she will short of $1.50.
- How much does each pencil cost?
- How much does Isaac have?
(a)
Difference in the number of pencils
= 7 - 5
= 2
Amount that Isaac needs to buy 2 pencils
= 4.10 + 1.50
= $5.60
Cost of each pencil
= 5.60 ÷ 2
= $2.80
(b)
Amount that Isaac has
= 5 x 2.80 + 4.10
= $18.10
Answer(s): (a) $2.80; (b) $18.10