Astory has a contest to guess the mass of 1 peanuts. if a peanut has a mass of about 0.45 then what would be a reasonable guess for the mass of 1

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.