What is ( 7v + 5 ) – ( 2v + 2 )

For the equations below which statement is true ? -2x=14 6x=-42

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

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180