Question

T-mobile calculates a customer's total monthly cell phone charge using the formula, T = f + rm where T is the total cell phone charge, f is the basic monthly fee, r is the rate per minute, and m is the number of minutes used that month solve for r, the rate charged per minuteA.) r = T - f - mB.) r = T/fmC.) r = f -m/TD.) r = T - f/m

Answer 1

`r\text{ = }(T-f)/(m)`

SOLUTION:

`\begin{gathered} T\text{ }=f+rm \\ T-f=rm \\ (T-f)/(m)=r \end{gathered}`