What is the midpoint (M) of a segment whose endpoints are A (0,0) and B (4, 8)

Autility company burns coal to generate electricity. the cost c(p), (in dollars) of removing p percent of the some stack pollutants is given by c(p)= 85000p/100-p a) find the cost to remove 30% of the pollutant b) find where the function is undefined

What properties allow transformation to be used as a problem solving tool

It says factor each expression 49x-28?