If r(x) = 3x - 1 and s(x) = 2x + 1, which expression is equivalent to (6)? 3(6)-1 2(6) + 1 (6) 2(6) + 1 36-1 26+1 (6) - 1 (6) + 1​

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