Career project with budgets and loans

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

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Rewrite so the subject can be y in the formula d=m-y/y+n