Ineed to show work for this problem but i have hw answer i just need to know what work to write number 18

Lorne subtracted 6x3 – 2x + 3 from –3x3 + 5x2 + 4x – 7. use the drop-down menus to identify the steps lorne used to find the difference.

Which statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

Aline passes through the point (–7, 5) and has a slope of 1/2 which is another point that the line passes through?