What is the equation of the parabola?

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.