krose5807
17.11.2020 •
Mathematics
eric can spend a maximum of $270 on office supplies. each ream of paper costs $6. each ink cartridge costs $18. which of the following graphs represents the possible combinations of paper and ink cartridges that he may buy? A , B, or C
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Ответ:
(-2.5,0)
Step-by-step explanation:
1.5(4x+3y)=-10(1.5) =
6x+4.5y=-15
6x+4.5y= 6x-5y (substitution)
-6x from both sides
4.5y =-5y
y=0
6x-0=-15
divide by 6
x=-2.5
Check:
-2.5(4)+3(0)=-10
-10= -10 (correct!)
(6)-2.5-0=- 15 (correct!)