Find the rate of change for this linear function y equals mx plus be

In which form is the following function written? y = - 2(x – 3)(x + 5)

For what value of (y) is 3^3/3^y =1/9

The area (a) of a circle with a radius of r is given by the formula and its diameter (d) is given by d=2r. arrange the equations in the correct sequence to rewrite the formula for diameter in terms of the area of the circle.