Problema Solution
A telephone call cost c cents for the first 3 minutes and 12 cents for each additional minute. Write and solve an equation to find the total cost of a 25 minute phone call.
Answer provided by our tutors
since
25 min = 3 min + 22 min
the cost for 25 min is
the first 3 min: c cents
the additional 22 min: 12*22 cents
the total cost is
c + 12*22 = (c + 264) cents