Find the 31st term of the following sequence.

9, 15, 21,

Factor the expression using gcf 9b+45

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

What’s the range cuz i can’t find it?