Question 986807
Allegra has a cell-phone plan that charges $55 per month and $0.10 for every minute that she uses the phone beyond what her plan allows.
 One month, she was billed $58.50
:
a. Define a variable for the unknown.
let m = no. of minutes over allowed amt
:
b. Write an equation to model the problem.
c. Solve the equation. Show your work.
f(m) = .10m + 55
d. Find the number of minutes that Allegra went over the time that the plan allows
58.50 = .10m + 55
58.50 - 55 =.10m
3.50 = .10m
m = 3.50/.1
m = 35 minutes over allot amt