A phone company charges $.25 for the first minute of a long distance call and $.07 for each addition minute. write an equation that gives the cost C of a long distance call as a function of the length t (in minutes) of the call. find the duration of a long distance cap that costs $2

long distancecall as afunctionof the length t is C(t) = 0.25 + 0.07t and thenumber of minutesis 25 minutes## What are linear equations?

Linear equationsareequationsthat have constant average rates of change. Note that theconstant averagerates of change can also be regarded as the slope or the gradient## How to determine the solution to the system?

system of linear equationsis a collection of at least two linear equations.number of minutesbe t and thetotal costbe C(t)total costis $2, theequationbecomesnumber of minutesis 25 minuteslinear equationsat: