Which if the following is a factor for number 9

2(x+9) (x-9)

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1