What two numbers can you multiply to get -21 and add to get -4

If jm equals 5x -8 and lm equals 2x -6 which expression represents jl

If i have a 24 in loaf of bread and i cut it into two pieces one 9 in how long was the other

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