Can somebody help me if you know the answer please tell me correctly

Find the value of the cosine for angle a

Ialready asked this but i never got an answer. will give a high rating and perhaps brainliest. choose the linear inequality that describes the graph. the gray area represents the shaded region. y ≤ –4x – 2 y > –4x – 2 y ≥ –4x – 2 y < 4x – 2

2x minus y equals 6, x plus y equals negative 3