Pls help me find the answer!

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

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

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?