Answer this right and I will send you 50 points as a gift

I don't know if I'm actually supposed to the whole thing out, but I can tell you that the coordinates for point R' is (-4,-5). Hope this helps!

Step-by-step explanation:

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)