What is the slope of (4,0) and (0,-5)

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

You have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint? you have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?