Simplify each expression 5x plus 11 plus 2x plus 9

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?

What is the sum of these mixed numbers 4 2/3+ 3 1/9