Madison bought a car for $30,000. She was told that it would depreciate in value by 18% each year. How long will it take to reach a value of $5,000?

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.