The Bears won 15 games last year. This year the Bears won 18 games. What is the percent increase in the number of games the Bears won from last year to this year?

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