SOLUTION: the cost of a long-distance phone call is $0.41 for the first minute and $0.32 for each additional minute. if the total charge for a long-distance call is $5.21, how many minutes w

Question 1068557: the cost of a long-distance phone call is $0.41 for the first minute and $0.32 for each additional minute. if the total charge for a long-distance call is $5.21, how many minutes was the call?
Found 2 solutions by ikleyn, MathTherapy:
Answer by ikleyn(52776) (Show Source): You can put this solution on YOUR website!
.
= 15 additional minutes.

Plus ONE first minute gives 16 minutes phone call, in total.

Thanks to "MathTherapy" for correction.

Answer by MathTherapy(10551) (Show Source): You can put this solution on YOUR website!
the cost of a long-distance phone call is $0.41 for the first minute and $0.32 for each additional minute. if the total charge for a long-distance call is $5.21, how many minutes was the call?

With C(m) being the total cost, based on "m" minutes, the following equation is formed: C(m) = .32(m - 1) + .41
C(m) = .32m - .32 + .41
C(m) = .32m + .09
5.21 = .32m + .09 ------- Replacing C(m) with 5.21
5.21 - .09 = .32m
5.12 = .32m
m, or time call lasted =
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