Determine whether the equation is true or false.

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 midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

If the value of cos330°is√3/2 then find cos 165°.