Subtract -6b'5 from 8b'5​

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points

Will mark brainliest! ( explain the answer too, it can be one sentence)

Right triangle lmn has vertices l(7, –3), m(7, –8), and n(10, –8). the triangle is translated on the coordinate plane so the coordinates of l’ are (–1, 8). (x, y) → (x + 6, y – 5) (x, y) → (x – 6, y + 5) (x, y) → (x + 8, y – 11) (x, y) → (x – 8, y + 11)