A pencil cost $2.50. A notebook cost $12.50 more than the pencil. Kylie spent $100 on such pencils and notebooks. She bought four times as many pencils as notebooks.
- How many notebooks did Kylie buy?
- How much money did Kylie spend on the pencils?
|
Pencils |
Notebooks |
Total |
Number |
4 u |
1 u |
|
Value |
2.50 |
15 |
|
Total value |
10 u |
15 u |
100 |
(a)
Cost of a notebook
= 12.50 + 2.50
= $15
Total cost of pencils and notebooks
= 10 u + 15 u
= 25 u
25 u = 100
1 u = 100 ÷ 25 = 4
Number of notebooks that Kylie bought
= 1 u
= 4
(b)
Amount that Kylie spent on pencils
= 10 u
= 10 x 4
= $40
Answer(s): (a) 4; (b) $40