Determine the quadrants in which each angle lies

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

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

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