What subtraction sentence does this show? A. 4.3 - (-0.9) = 5.2
B. 4.3 - 0.9 = 5.2
C. -4.3 - 0.9 = 5.2
D. -4.3 - (-0.9) = 5.2

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