X^2 - 4 / x - 8 divided by (x - 2) / x - 3 choices are
a : (x - 2)(x - 3) / x - 8. b : (x - 2)(x + 3) / x - 8. c : x - 2 / (x - 8)(x - 3). d : (x + 2)(x - 3) / x - 8

7x+8y=-18, 4x-9y=-3 solve the system of equations

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

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?