Problema Solution
Kaya buys a $20 phone card. She is charged $.15 per minute for calls. What equation give the value v left on her card after she makes t minutes of calls?
Answer provided by our tutors
v = 20 - 0.15t
Kaya buys a $20 phone card. She is charged $.15 per minute for calls. What equation give the value v left on her card after she makes t minutes of calls?
v = 20 - 0.15t