Question

I'm multiplying and dividing functions, could someone just check my work for me?

Answer 1

Thanks, I'll type them in... this is the first one.

f(x) = 4x
g(x) = x + 5

f(x) * g(x) = ?

4x(x + 5) =
4x * x + 4x * 5 =
4x^2 + 4x * 5 =
4x^2 + 20x

Answer 2

Excellent.

Answer 3

Thanks

Answer 4

Could you check a few more for me please?

Answer 5

You're welcome.

Answer 6

Sure

Answer 7

f(x) = 2x + 1
g(x) = 3x + 2

f(3)/g(2) = ?

(2 * 3 + 1)/(3 * 2 + 2) =
(6 + 1)/(3 * 2 + 2) =
7/(3 * 2 + 2) =
7/(6 + 2) =
7/8

Answer 8

Correct. You're really good at this.

Answer 9

Thanks:)

A few more now...

f(x) = x^2 - 5
g(x) = 3x - 1
f(4)*g(-1) = ?

(4^2 - 5) * (3 * (-1) - 1) =
(16 - 5) * (3 * (-1) - 1) =
11 * (3 * (-1) - 1) =
11 * (-3 - 1) =
11 * (-4) =
-44

Answer 10

Right again

Answer 11

:D

Here's the next one

f(x) = x - 4
g(x) = 3x + 6

f(5) + g(1)/f(6) - g(-2) = ?

{(5 - 4) + (3 * 1 + 6)}/{(6 - 4) - (3 * (-2) + 6)} =
{1 + (3 * 1 + 6)}/{(6 - 4) - (3 * (-2) + 6)} =
{1 + (3 + 6)}/{(6 - 4) - (3 * (-2) + 6)} =
{1 + 9}/{(6 - 4) - (3 * (-2) + 6)} =
10/{(6 - 4) - (3 * (-2) + 6)} =
10/{2 - (3 * (-2) + 6)} =
10/{2 - (-6 + 6)} =
10/{2 - 0} =
10/2 =
5

Answer 12

Excellent work

Answer 13

Thank you so much. Just 4 more now.

f(x) = 3x
g(x) = 3x - 6
f(x) * g(x) = ?

3x(3x - 6) =
3x * 3x - 3x * 6 =
9x^2 - 3x * 6 =
9x^2 - 18x

Answer 14

You got it!

Answer 15

:D:D:D

f(x) = 56x^8
g(x) = 7x^3
f(x)/g(x) = ?

56x^8/7x^3 =
8x^5

Answer 16

Correct again.

Answer 17

f(x) = 3x
g(x) = 3x - 6
f(2) * g(6) = ?

(3 * 2) * (3 * 6 - 6) =
6 * (3 * 6 - 6) =
6 * (18 - 6) =
6 * 12 =
72

Answer 18

Exactly

Answer 19

Wow! Thanks! One more left.

f(x) = 56x^8
g(x) = 7x^3
f(2)/g(2) = ?

(56 * 2^8)/(7 * 2^3) =
(56 * 256)/(7 * 2^3) =
14,336/(7 * 2^3) =
14,336/(7 * 8) =
14,336/56 =
256

Answer 20

Well done!

Answer 21

Wow! :D:D:D Thanks for all your help!!! :D