What is the vertex of the parabola? y+4=12(x−7)2

How many sides does a regular polygon have if each exterior angle measures 72a.3b.4c.5d.6

Will give brainliest what is the value of x? enter your answer in the box.

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