5points how would you describe the lines represented by railroad tracks? explain

Which expression is equivalent to 5r6141 2r+st6

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

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.