Can you help me by solving the following question ? question is a part of trigonometry
question is 100% correct and we have to prove it.

Two rigid transformations are used to map abc to qrs. the first is a translation of vertex b to vertex r. what is the second transformation? a reflection across the line containing ab a rotation about point b a reflection across the line containing cb a rotation about point c

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Find the solution of this system of equation -7x+y=-20 9x-3y=36