Why are all the good girls taken seriously there are none left

At diana's closet, 1/6 of the clothes are white and another 7/12 are black. what fraction of the clothes is either black or white?

Which representation has a constant of variation of -2.5

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