Help with this problem, please

He expression 2(l + w) is used to calculate the perimeter of a rectangle, where l is length and w is width. if the length is fraction 2 over 3 unit and the width is fraction 1 over 3 unit, what is the perimeter of the rectangle in units? fraction 2 over 3 unit 1 unit 1fraction 2 over 3 units 2 units

What number should be added to both sides of the equation to complete this square? x^2-10x=7

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall