PLEASE HELP QUICK!! A bouquet of 40 flowers is made up of roses, carnations, and daisies. The bouquet of 45% roses and 15% carnations. How many of the flowers are roses?

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