Whatever is inside parentheses first [g(x)], is what you would evaluate first, then after that, you would substitute that answer into the f(x) function for EVERY "X" YOU SEE:
[2x² + 5]² + [2x² + 5] + 2
[2x² + 5]² + [2x² + 7]↓
This is your final answer. You get it?
Y = 40 + 4m
m = minutes
y = total papers graded
4x + y = -1
y = -4x -1
slope of the parallel line
m = -4
General equation of the parallel line
y = -4x + c
if this passes through (5,0)
0 = (-4*5) + c
c = 20
so the equation is
y = -4x + 20