Question

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?

Answer 1

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

Answer 2

I don't know i came here for the answers!!

Answer 3

10 rulers and 26 folders
rulers are $.20 each and folder $.70 each