How do you do ( 2 to the -7 ) < 2 , to the power of negative 7

What are “like terms”? why can we only add like terms?

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?

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.