I don't get division, especially long division

Select the correct answer from each drop-down menu. the length of a rectangle is 5 inches more than its width. the area of the rectangle is 50 square inches. the quadratic equation that represents this situation is the length of the rectangle is inches.

Apply distributive property to write equivalent equation 105×35m

Through which points should a line of rotation be placed to create a cylinder with a radius of 3 units