24 students in christine's class are wearing tennis shoes there are 30 students in the class christine says that 70% of the students in the class are wearing tennis shoes is christine correct explain your response

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.