After completing the square, what are the solutions to the quadratic equation below? x²7x+9=4 ● A. x = 1 + 129 O B. - - 2 + 129 O c. x=71./29 O D. x=-70/29​

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling