Question

10 & 11 WILL GIVE BRAINLIST

Answer 1

Answer:

D.

Step-by-step explanation:

(g-f)(x) ➡ g(x) - f(x)

$9x {}^{3} - 4 {x}^{2} + 10x - 55 - (4 {x}^{3} + 3 {x}^{2} - 5x + 20)$

➡

$9 {x}^{3} - 4 {x}^{2} + 10x - 55 - 4 {x}^{3} - 3 {x}^{2} + 5x - 20$

➡add the like terms

$5 {x}^{3} - 7 {x}^{2} + 15x - 75$

Answer 2

Answer:

10)$38.50

11)D

Step-by-step explanation:

10) n = no. of rides

f(n) + g(n) = 1 + 2.5n

when n=15, 1 + 2.5(15)

= $38.50

11)f(x) = 4x³+3x²-5x+20

g(x) = 9x³-4x²+10x-55

(g-f)(x)=9x³-4x²+10x-55-(4x³

+3x²-5x+20)

= 9x³-4x²+10x-55-4x³

-3x²+5x-20

= 5x³-7x²+15x-75

(Correct me if i am wrong)