Kendra has a math test every 12 school days in a vocabulary test every 9 school days. she has both a math test and a vocabulary test today. when will she have both a math and a vocabulary test again?

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm