PLEASE I NEED HELP WITH 17, 18, 19, and 20 it’s DUE TOMORROW AND I DONT UNDERSTAND PLEASE HELP ME

Plz (02.03 mc) which sequence of transformations will change figure pqrs to figure p′q′r′s′? (5 points) select one: a. counterclockwise rotation about the origin by 90 degrees followed by reflection about the x-axis b. counterclockwise rotation about the origin by 90 degrees followed by reflection about the y-axis c. counterclockwise rotation about the origin by 180 degrees followed by reflection about the x-axis d. counterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axis

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

How do i find the missing angle measure in a polygon