Arectangle's length is 6 units greater than its width. write an equation expressing the rectangle's area, a, as a function of w. a) a = 2w + 6 b) a = 4w + 12 c) a = w2 + 6w d) a = w2 + 12w

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