What is the factored form of x2 - 4x – 5?
^
(x + 5)(x - 1)
(x + 5)(x + 1)
(x - 5)(x - 1)
(x - 5)(x + 1)

Ineed with 14, 16, 28 and 36 me. we didn't go over them in class so i don't know what to do.

Alaptop computer is purchased for $1350 . after each year, the resale value decreases by 30% . what will the resale value be after 5 years?

Awrestling tournament begins with 128 competitors. in the first round, each competitor has 1 match against another wrestler. the winner of each match moves on to the next round until there is a winner. write a sequence in which the terms represent the number of players still in the tournament at the end of each round. describe the sequence? how many rounds are in the tournament?