Use the wronskian to determine whether the functions y1=sin(4x)y1=sin(4x) and y2=cos(6x)y2=cos(6x) are linearly independent.

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