A pencil cost $3.50. A marker cost $12.50 more than the pencil. Betty spent $115 on such pencils and markers. She bought twice as many pencils as markers.
- How many markers did Betty buy?
- How much money did Betty spend on the pencils?
|
Pencils |
Markers |
Total |
Number |
2 u |
1 u |
|
Value |
3.50 |
16 |
|
Total value |
7 u |
16 u |
115 |
(a)
Cost of a marker
= 12.50 + 3.50
= $16
Total cost of pencils and markers
= 7 u + 16 u
= 23 u
23 u = 115
1 u = 115 ÷ 23 = 5
Number of markers that Betty bought
= 1 u
= 5
(b)
Amount that Betty spent on pencils
= 7 u
= 7 x 5
= $35
Answer(s): (a) 5; (b) $35