What is the nonpermissible replacement of y-3/y+3

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

How can constraints be used to model a real-world situation?

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.