Answer:

Step-by-step explanation:
Given the expressions: 
We add:

B. b(x) = (50x) - 150
C. f(x) was moved down 150 units
I hope this helps!
Step-by-step explanation:
the intersection of the interval: (-∞, 7) and [-5, +∞)
is [-5, 7)
and the union of the interval: (-∞, 7) and [-5, +∞)
is (-oo, +oo)