Write an equivalent expression by combining the like terms:

5x + 9 + (-7x) = ? x + 9

Find the amount in a continuously compounded account for the given condition. principal: $1000, annual interest rate: 4.8%, time: 2 yr

Simply 8x squared + 5(7x squared- x) - 2x =

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your