Find the value of x.

Which composition of similarity transformations maps polygon abcd to polygon a'b'c'd'? a dilation with a scale factor less than 1 and then a reflection a dilation with a scale factor less than 1 and then a translation a dilation with a scale factor greater than 1 and then a reflection a dilation with a scale factor greater than 1 and then a translation

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)