Can someone plz help ASAP -5+30<-10

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

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

Use the squared identities to simplify sin^2x cos^2x