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Mathematics 7 Online
OpenStudy (brucebaner):

help me @mathmath333

OpenStudy (brucebaner):

The cost for copies varies directly with the number of copies made. A customer paid $8.45 for 13 copies. How much will the customer pay for 27 copies? $[________]

OpenStudy (brucebaner):

is it 17.55?

OpenStudy (mathmath333):

yes

OpenStudy (anonymous):

You would have to use the equation for Direct Linear Variations which are f(x)=kx and k=f(x)/x

OpenStudy (anonymous):

So to solve you would have to know how much it costs each

OpenStudy (anonymous):

So you would have to use the second equation to find that out first so.. plug in the numbers and tell me when you get the answer

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