Find the sum and express it in simplest form (-b-5x-3)+(2b-4x+7)

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

This question awards 100 ! i really don’t want to fail i will also mark you !

Me, prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3) and j(0,1) is a rectangle using the parallelogram method and a rectangle method.