Question

Consider the functions f(x) = 13x2 and g(x) = 7x − 5. What is the value of (f + g)(5)?

325

9750

355

295

Answer 1

@Dimples

Answer 2

Okay you have two functions here right?
Function f(x) which is 13x2 or 13 x (x) x 2 (or should that be ^2?).
and
Function g(x) which is 7x - 5.
The problem wants you to solve (f+g)(x)
or
(f+g)(5)
So just substitute x for 5 and solve both function then add them together.

Answer 3

so it would be etheir a b or d?

Answer 4

BTW
\[f(x) 13x^{2}\]
And
\[g(x)7x-5\]

Answer 5

so it would be C

Answer 6

Correct.

Answer 7

i need help on anther one

Answer 8

Okay

Answer 9

Consider the functions f(x) = 3x − 2 and g(x) = x2 − 1. What is the value of (f − g)(−2)?

−8

−5

−11

3

Answer 10

Okay this is the same thing as last time only x=-2 this time.

Answer 11

so its -11

Answer 12

dimples?

Answer 13

I'm coming up with -13 I'm sure it's because I'm either misreading the original problem or you mistyped it, but if you solved and came up with -11 that I would venture that you are correct.

Answer 14

so the awnser is -11?

Answer 15

I cannot verify that because I cannot properly read the original problem. Can you enter the problem using the equation generator button in the lower left there?

Answer 16

I've tried various versions of the problem, but cannot come up with any of the given answers.

Answer 17

okay can you check my work and see if i did them right?

Answer 18

As long as I can read the problem I can check them for you no problem.

Answer 19

1.Choose the correct procedure for calculating (f − g)(−2) if f(x) = 13x2 and g(x) = 7x − 5.

Calculate f(−2) and g(−2), then subtract them.

Calculate f(−2) and g(−2), then add them together.

Calculate f(−2) and g(−2), then write the results as an ordered pair.

Calculate g(−2), plug the result into f(x) and simplify.

i got B

Answer 20

2. Choose the best description of how to calculate f[g(3)] if f(x) = 3x − 2 and g(x) = x2 − 1.

Calculate f(3) and g(3), then multiply them together.

Calculate f(3) and g(3), then write the results as an ordered pair.

Calculate f(3) and g(3), then subtract them.

Calculate g(3), plug the result into f(x) and simplify.
i got A

Answer 21

Wait one at a time.

Answer 22

#1 is incorrect.

Answer 23

okay are 1 and 2 right?

Answer 24

how is 1 wrong?

Answer 25

Both are wrong.

Answer 26

Number 1 is wrong because you the answer you selected is performing the wrong operation.

Answer 27

Look carefully at the problem. It is (f - g).

Answer 28

so its subtract so its a?

Answer 29

Number 2 is wrong because the answer you selected is performing the operation in the wrong order. And yes you are correct now #1 is A. :)

Answer 30

is number 2 c?

Answer 31

No.

Answer 32

nvm number 2 is a?

Answer 33

cause its multiplying

Answer 34

In order to figure out f[g(3)], you have to first know what g(3) is.

Answer 35

No # 2 is not a either.

Answer 36

so its d?

Answer 37

In that problem you are essentially figuring out a function of a function. Do you follow what I'm saying?

Answer 38

yes so it is B!

Answer 39

To calculate f(x) when x=g(3) then you have to first calculate g(3).

Answer 40

No it is D. lol
You have to know what g(3) is before you can solve f[g(3)]

Answer 41

3. Consider the functions f(x) = 3x2 and g(x) = −2x − 5. What is the value of f[g(−4)]?

9

−31

27

3

Answer 42

i put 27

Answer 43

This is just like the last one. You have to calculate one first before you can calculate the other.

Answer 44

Give me one moment and I'll calculate to check your answer.

Answer 45

Yes 27

Answer 46

4 . Consider the functions f(x) = 13x2 and g(x) = 7x − 5. What is the value of (f + g)(5)?

325

9750

355

295

Answer 47

my awnser is 355

Answer 48

Is f(x)\[13x^{2}\]

Answer 49

yep

Answer 50

Then yes 355

Answer 51

5. Choose the correct procedure for calculating (f + g)(−4) if f(x) = 2x + 1 and g(x) = x2 − 10.

Calculate f(−4) and g(−4), then write the results as an ordered pair.

Calculate f(−4) and g(−4), then add them together.

Calculate f(−4) and g(−4), then subtract them.

Calculate g(−4), plug the result into f(x) and simplify.

i put b

Answer 52

Correct.

Answer 53

Is that all of them?

Answer 54

no 3 more

Answer 55

K

Answer 56

Consider the functions f(x) = 8x + 2 and g(x) = 5x − 3. What is the value of ( f over g )(4)? Please show all of your work for full credit.

Answer 57

my awnser :

8x+2/5x-3 then i pluged in 4 for x: 8(4)+2/5(4)-3= 32+2/20-3= 34/17= 2

final answer is 2

Answer 58

Okay give me a minute on this one.

Answer 59

ok

Answer 60

\[f(x)=8x+2\]
\[g(x)=5x-3\]
\[\left( \frac{ f }{ g } \right)\left( 4 \right)\]
\[f(4)=8\times4+2=34\]
\[g(4)=5\times4-3=17\]
\[\frac{ 34 }{ 17 }=2\]
Sorry it took so long I wanted to be sure that you could read all the work properly and yes you were correct.

Answer 61

I think you just have 2 more?

Answer 62

If you want me to check the last two, just let me know. Now that you saw the work on that last one I won't need to show you again and I'll be faster checking the answer.