How do i find the answer for (9^2x-3^2x-6)?

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Need match the functions with correct transformation. f(x) = -3x f(x) = |x-1|+3 f(x) = √(x+3) 1/2x² f(x) = (x+1)²-3 4|x| 1. compress by a factor of 1/2 2. stretch by a factor of 4 3. shift to the left 3 4. shift to the left 1 5. shift up 3 6. reflection

3x = 729 solve for x plz . it's urgent. will mark