You choose a marble at random from a bag containing 12 red, 11 blue, 3 green, 12 yellow, and 22 black marbles. The marble is red. What is the probability of this event

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.