Posted by **Justin** on Thursday, February 14, 2013 at 12:33am.

Serena paid $20.20 for 36 rulers and folders. She bought 16 more folders than rulers. If each folder cost $0.50 more than each ruler, how much did each folder cost?

- Math -
**Reiny**, Thursday, February 14, 2013 at 7:51am
rulers --- x

folders --- x+16

x + x+16 = 36

2x = 20

x = 10 , then y = 26

so she bought 10 rulers and 16 folders

now to the cost:

cost of ruler --- y

cost of folder --- y + .5

10y + 16(y+ .5) = 20,2

10y + 16y + 8 = 20.2

26y = 12.2

y = .4692

A ruler costs $0.47 and a folder costs $ 0.97

check:

10(.47) + 16(.97) = 20.22

- Math -
**Tralala**, Thursday, January 30, 2014 at 4:28pm
I don't know i came here for the answers!!

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