Given:
The demand function is,

The total revenue function is,

Answer:
Answer:
16.9
Step-by-step explanation:
Answer:
(f + g)(x) = – 3x^2 + 5x - 8
Step-by-step explanation:
(f + g)(x) = f(x) + g(x)
= 5x^2 + 9x – 4 + (– 8x^2 – 3x – 4)
= 5x^2 + 9x – 4 – 8x^2 – 3x – 4
Combine
= – 3x^2 + 5x - 8
Vertical line has no slope. so only look at the x value. x=-4.
Step-by-step explanation:


