Which of the following expressions does not mean the same as the other three? x + (-17)
- 17 + x
x - 17
x - (-17)

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

What is 32+4 x (16 x 1/2) -2 show your work}

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')