The jones family attends the movies for 47 with 2 adults and 3 kids

Which expression is equivalent to sq-80

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

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