Please solve this problem I need help!

F(x)= 4x g(x) =x-1 what is f(x) divided by g(x)

Given abcd ac=38 and ae=3x+4 find the value of x

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