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A telephone company charges customers a certain amount for the first minute of a long distance call and another amount for each additional minute. A customer makes two calls to the same city—a 31-minute call for $1.94 and a 13-minute call for $0.86. If there is a federal tax rate of 3.7% and a state tax rate of 7.4% on all long distance calls, find, to the nearest minute, the longest call to the same city whose cost will not exceed $9.00.

Mathematics
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for the first half of the problem i got .14 for the cost of the first minute and then .06 for the additional minutes.. i need help solving the last question about the federal tax
I'd say add the taxes together 3.7+7.4 = 11.1% then the equation becomes y = (11.1/100)*( 0.14 + 0.6(m-1) ) does that work?
am i soppose to solve for m? or y?

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Other answers:

im confused and its .06
you solve for m (mintute) given that y (money) equals $9
@xon1300 In your formula, \(y\) would only be the tax. It wouldn't include the cost of the call.
so \[y = (111.1/100)*( 0.14 + 0.06(m-1) )\] when y=9 m= what?
There, that one's better. :)
hard to count ones, they marge together, lol
Haha yeah!
Thank you so much!! thats the same thing i did and thats why i couldn't figure it out i hade 11.1

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