I'm having trouble with problems 9-12

answer:

#9:  9

#10:  31

#11:  1

#12:  -44

Step-by-step explanation:

#9:  f(x) = 3x^3 + 4x^2 - 5x + 7;  x = 1

Step 1:  Plug in 1 for x and solve

3(1)^3 + 4(1)^2 - 5(1) + 7

3(1) + 4(1) - 5 + 7

3 + 4 - 5 + 7

9

answer:  9

#10:  g(x) = x^5 - 2x + 3x^2 - 9;  x = 2

Step 1:  Plug in 2 for x and solve

(2)^5 - 2(2) + 3(2)^2 - 9

32 - 4 + 3(4) - 9

32 - 4 + 12 - 9

31

answer:  31

#11:  k(x) = 4x - 8x^6 + 1;  x = 0

Step 1:  Plug in 0 for x and solve

4(0) - 8(0)^6 + 1

0 - 0 + 1

1

answer:  1

#12:  f(x) = x + 2x^3 - x^4 - 10;  x = -2

Step 1:  Plug in -2 for x and solve

(-2) + 2(-2)^3 - (-2)^4 - 10

-2 + 2(-8) - 16 - 10

-2 - 16 - 16 - 10

-44

answer:  -44

true

step-by-step explanation: