Bill exercised for 3 minutes and burned 14 calories. Then he exercised for an additional mminutes, burning calories at this same rate. If Bill burned a total of 210 calories, which of the following equations could be
used to determine the value of m?
14 + 3(14m) = 210
14 +
3
m =
210
14
• 4 (m-3) = 210
• 4 (m+3) = 210

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