PLS HELP ME PLSSS DESPERATELY NEED ASAP HELP WITH ALL WORK

Vinay constructed this spinner based on the population of teachers at his school according to vinays model what is the probability that he will have a male history teacher two years in a row

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

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.