Please help me do this question​

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

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

Simply 8x squared + 5(7x squared- x) - 2x =