P-please help (30 points)

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Rectangle leg this 11feet and perimeter of 38feet what is the width of the rectangle in feet

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