A stapler cost $3.50. A pencil cost $14.50 more than the stapler. Joelle spent $160 on such staplers and pencils. She bought four times as many staplers as pencils.
- How many pencils did Joelle buy?
- How much money did Joelle spend on the staplers?
|
Staplers |
Pencils |
Total |
Number |
4 u |
1 u |
|
Value |
3.50 |
18 |
|
Total value |
14 u |
18 u |
160 |
(a)
Cost of a pencil
= 14.50 + 3.50
= $18
Total cost of staplers and pencils
= 14 u + 18 u
= 32 u
32 u = 160
1 u = 160 ÷ 32 = 5
Number of pencils that Joelle bought
= 1 u
= 5
(b)
Amount that Joelle spent on staplers
= 14 u
= 14 x 5
= $70
Answer(s): (a) 5; (b) $70