Which choice is the conjugate of the expression below when x is less than 4

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.