Please help me. this is trig and all I need is an explanation on how to start

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is

Sole the equation 6n + 9 = -3n - 21 - 6 for n

Part a: explain why the x-coordinates of the points where the graphs of the equations y = 2−x and y = 8x+4 intersect are the solutions of the equation 2−x = 8x+4. (4 points) part b: make tables to find the solution to 2−x = 8x+4. take the integer values of x between −3 and 3. (4 points) part c: how can you solve the equation 2−x = 8x+4 graphically? (2 points)