PLEASE ASAP ILL GIVE BRAINLIEST.

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

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b. you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c. you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d. you spend $5 plus $10 per week until you have less than $45.

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2 acellus answer