PLEASE HELP I NEED THE VALUES OF M AND P

15 points ! ~ see if you know the answer to both you!

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction

Someone answer this asap for the length, in feet, of a rectangular rug is represented by the expression 5x² + 2x. the width, in feet, is represented by the expression 3x². which expression represents the perimeter, in feet, of the rug? a. 8x² + 2x b. 8x² + 4x c. 16x² + 2x d. 16x² + 4x