What are 5 reasons to look for a good reason to choose a financial institution

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(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

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.