How do you change your name on NO subject just a question

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Aportion of a hiking trail slopes downward at about an 84° angle. to the nearest tenth of a flot, what is the value of x, the distance the hiker traveled along the path, if he has traveled a horizontal distance of 120 feet? a. 143.3 b. 12.5 c. 120.7 d. 130.2

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out