Can you help me in this question?

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48

How do you find the distance of each number from the mean

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.