Is the equation a linear function or nonlinear function?

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

How are algebraic expressions evaluated using substitution?

What is 10+10+20 about the origin the square root of a triangle.