Question 949246
The cost of a long-distance phone call is $0.41 for the first minute and $0.30 for each additional minute. If the total charge for a long-distance call is $7.91, how many minutes was the call?

Please help me! Help me find a solution with steps so that I know how to handle a math problem like this in the future. Thanks!
<pre>Let number of minutes call lasted, be m
Then number of minutes used, at $0.30 is: m - 1
Therefore, C(m) = .3(m - 1) + .41
C(m) = .3m - .3 + .41
C(m) = .3m + .11
7.91 = .3m + .11 ------- Substituting 7.91 for C(m), or cost
 .3m = 7.91 - .11
 .3m = 7.8
m, or minutes call lasted = {{{7.8/.3}}}, or {{{highlight_green(26)}}}