B. your answer is an angle
I think it's 2+4×5=6 or 7+910=10
That is simplest form
50x+56=50x+56, they are not like terms so you can't add them
if you did want to factor, the common term is 2 so then
50x+56=2(25x+28)
I am not sure, but we're you going to put up a sum.