SOLUTION: Translate to an equation. f=folder's at $0.30 apiece and n=notebooks at $1.50 apiece The total of folders and notebooks is $12 Graph the equation, and use the graph to determ

Question 551157: Translate to an equation.
f=folder's at $0.30 apiece
and n=notebooks at $1.50 apiece
The total of folders and notebooks is $12
Graph the equation, and use the graph to determine three different combinations of folders and notebooks that total $12
Answer by fcabanski(1391) (Show Source): You can put this solution on YOUR website!
12 = .3f + 1.5n

It's a linear equation, so find two points. Try when n=0 and f=0.

If n=0 (0 notebooks) then it's 12 = .3f * 0
12/.3 = f = 40

If f=0 (0 folders) then it's 12 = 0 + 1.5n
12/1.5 = n = 8.

Those points show two combinations (n,f): (8,0) and (0,40).

If you graph it and look at the line, you'll find a third whole number combination (4,20).

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