There is no image but I would likely be glad to help! :)
Well, i'm just going to take a stab at this:
The answer out of:
> It is (18,9) ,
> It is (9, 18)
I believe both are correct as those are both plausible coordinates (although I may be wrong)
Line R: 2x + 2y = 18 (x + y = 9)
Line M: x + y = 9
There are infinite many solutions as they are the same line.
16 because one eighth is 2 and if u times 2 by 8 because it’s one eighth then u have 16
H'(x) = 2f'(x)
h'(1) = 2*f'(1) = 2*4
h'(1) = 8