Adiver when 25.65 feet below the surface of the ocean, and then 16.5 feet further down, he then rose 12.45 feet. write and solve an expression to find the driver's new depth.

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.