After injuring his knee, Kai began having pain and numbness in his lower leg. The doctor said the injury damaged nerves
that run all the way down his leg.
Damage to which system is causing Kai's pain and numbness?
the peripheral nervous system
the central nervous system
the endocrine system
the cirulatory system

What is the value of x? enter your answer in the box. (cm)

The tuition costs, c, for a local community college are modeled by c(h) = 250 + 200h, where h represents the number of credit hours taken. the local state university has tuition costs, s, modeled by the function s(h) = 300 + 180h. how many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

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