You use 28% of your available sheets
28% = .28
500 x .28 = 140 sheets used
(0,500) (1,360)
m = 360-500/1-0
m = -140
y = -140x + 500
C+p=15
5c+7p=91
multiply 5 to 1st equation and subtract it from 2nd
multiply 5 to 1st equation to get
5c+5p=75
now subtract this from 2nd equation
thats 2p=16
so
p=8
now we find c from
c+p=15
c=7
Answer:
5
Step-by-step explanation: