OK, so, How to stop procrastinating and get work done

What is the missing value in the proportion 4/5 = x/30

Points j and k plotted on the coordinate grid are two vertices of rectangle jklm rectangle jklm has an area of 7 square units point j is located at 2,1 and point k is located at -5,1 each vertex of the rectangle is located at a point that has integer coordinates. what is the perimeter of rectangle jklm? (need answer asap)

The area (in square feet) of an x-foot-wide sidewalk can be modeled by y=-0.002x^2+0.006x. what is the width of the sidewalk to the nearest foot?