4. What is the angle of rotation for the following figure?
a 60°
b 720
c 90°
d 120°

Which system of linear inequalities is represented by the graph? !

Which expression gives the area of the triangle shown below

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