The value of sin^2 30° - cos^2 30° is

He expression 2(l + w) is used to calculate the perimeter of a rectangle, where l is length and w is width. if the length is fraction 2 over 3 unit and the width is fraction 1 over 3 unit, what is the perimeter of the rectangle in units? fraction 2 over 3 unit 1 unit 1fraction 2 over 3 units 2 units

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

Graph the equation by plotting point x=2