Question

Given the following functions f(x) and g(x), solve (f ⋅ g)(2) and select the correct answer below: (1 point)

f(x) = 2x2 − 10

g(x) = x + 9
A −22
B 22
C −66
D 66


2. Given the following functions f(x) and g(x), solve f over g (−4) and select the correct answer below: (1 point)

f(x) = 4x − 4

g(x) = x − 1

A −20
B −4
C 4
D one fourth

Answer 1

First off, is f(x) = 2x2 − 10
written as \[2^{2} - 10\]

Answer 2

Oops

Answer 3

I understood the last one @Maddy1251 but this is worded different

Answer 4

Yes it is

Answer 5

\[2x^{2} - 10\]

Answer 6

Okay

Answer 7

Yes thats correct

Answer 8

The one you just posted

Answer 9

f(x) = 2x2 − 10
g(x) = x + 9
Now you know with how the last ones, we added them together?

Answer 10

Yes, so is it 2x2-10+x+9?

Answer 11

No. But when it said (f+g), we added them together. This time it says ( f x g) we we will multiply them together! Can you do that for me?

Answer 12

f(x) = 2x2 − 10

g(x) = x + 9

We multiply these two together

Answer 13

2x2-10x+9?

Answer 14

Well, f(x) = 2x^{2} - 10

Answer 15

(2x^2 -10)(x+9)
Foil them for me.
First, out, inner, last

Answer 16

Right

Answer 17

To confirm: here we are MULTIPLYING f and g. You both seem to recognize that.

Please show all steps of your multiplication.

Answer 18

if fx Is (2x)2 that would be the answer

Answer 19

(f * x)(x)= ( )( )

Answer 20

Yes what mathmale is getting as. If you put them into FOIL method you can then multiply all terms, then do whatever configuring you need to do.

Answer 21

f(x) = 2x2 − 10

g(x) = x + 9

so ; (2x^2-10)(x+9)

Answer 22

Okay that makes sense. So the answer is -22, or is there further steps?

Answer 23

Oh, I get it now. I forgot the parenthesis.

Answer 24

Did you multiply the two functions together?

Answer 25

I wanted to see what you got when you multiplied them together.

Answer 26

Let me do it real fast. Just a sec

Answer 27

Take your time. There is no rush

Answer 28

(2x^2-10)(x+9)
3x^2-19

Answer 29

The work shared in your image is well done, and your answer (-22) is correct.

whose work was that?

Answer 30

@mathmale had to have been hers. I will still on the step with her on multiplying them. :P

Answer 31

OK. Good job (both of you).

Answer 32

Much thanks @mathmale , I have learned from watching the ones like you guys.

Answer 33

Can you help me with the second question, i posted on this question?

Answer 34

Yes! Let me go up and grab the equations

Answer 35

Okay I think I got the start of it right. I got

Answer 36

Given the following functions f(x) and g(x), solve f over g (−4) and select the correct answer below: (1 point)

f(x) = 4x − 4

g(x) = x − 1

4x-4/x-1

Answer 37

Do they mean fractions, or dividing?

Answer 38

4x-4/x-1

Answer 39

Division

Answer 40

Okay! So 4x-4 divided by x-1

Answer 41

Would I divide 4x/x? So would it be 4x?

Answer 42

Then -4 because 4/-1?

Answer 43

Erm. Not quite. Hold on :)

Answer 44

Ok

Answer 45

f(x) = 4x − 4

g(x) = x − 1

Answer 46

Correct

Answer 47

So it is 4

Answer 48

Okay, then what about the last part

Answer 49

Hmmm when it equals -4? If I remember that being correct

Answer 50

Yes

Answer 51

So the first part is 4x right?

Answer 52

I wonder if they mean
Given the following functions f(x) and g(x), solve f over g (−4) and select the correct answer below: (1 point)

f(x) = 4x − 4

g(x) = x − 1

4x-4 / x - 1

x= -4
4(-4)-4 / (-4) - 1
Is this what you were trying to get at from the beginning?

Answer 53

-16 - 4 / -5

Answer 54

Yes.

Answer 55

-20 / -5

Answer 56

So 4 is the answer?

Answer 57

-20 / - 5 = 4 huh well see when I divided the two, I got 4. So I had the answer from just dividing them like regular numbers, or you could do synthetical division but I didn't know if you knew how to do that..
Or, put them in fractional terms and substitute "-4" for x.

Answer 58

Yep, that's the answer. Do you understand how to get the answer?

Answer 59

Yes, I got it. Thanks so much for your help :)

Answer 60

Not a problemo :)

Answer 61

As long as you understand everything I am happy

Answer 62

the answer is 4 even without replacing x by taking 4 as a common factor it will be 4(x-1)/x-1......x-1/x-1=1. so 4x1=4