I believe it is all of the above
Substitute y = 4x - 1 in the first equation:-
4x - 1 = 8x - 9
-4x = -8
x = 2
Now substitute x = 2 in the second equation:-
y = 4(2) - 1 = 7
Solution is (2, 7). (That is y = 7 and x = 2)
Part B
The graphs will intersect at the point (2, 7)
1.84 = 184 / 100 Divide top and bottom by 2
92 / 50 Divide top and bottom by 2
46 / 25
So either 184/100 or 92/50 or 46/25 is equivalent to 1.84