A pencil cost $3.50. A marker cost $14.50 more than the pencil. Kathy spent $150 on such pencils and markers. She bought twice as many pencils as markers.
- How many markers did Kathy buy?
- How much money did Kathy spend on the pencils?
|
Pencils |
Markers |
Total |
Number |
2 u |
1 u |
|
Value |
3.50 |
18 |
|
Total value |
7 u |
18 u |
150 |
(a)
Cost of a marker
= 14.50 + 3.50
= $18
Total cost of pencils and markers
= 7 u + 18 u
= 25 u
25 u = 150
1 u = 150 ÷ 25 = 6
Number of markers that Kathy bought
= 1 u
= 6
(b)
Amount that Kathy spent on pencils
= 7 u
= 7 x 6
= $42
Answer(s): (a) 6; (b) $42