Answer:
DDDDD...............................
The in is -5 the out for 7 is -21 the out for -3 is 9the infor 15 is -5 the out for -10 is 30
18 divided by (-9) equals -2.
Since PB' = (3/5)*PB, the scale factor is 3/5, the 2nd choice.
The last two are correct: “If I know the measures of Angles C and B, I can find the angles of A and D.” and “If I know the measure of angle A, I can find the measure of angle D by subtracting from 180”
Hope that helps: )