Free points so what is 4+4 i will heart and give you a brainiest

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

I’m confused on how to work the pie charts

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.