## A community for students. Sign up today

Here's the question you clicked on:

## thebroski 2 years ago Let f(x) = -4x + 7 and g(x) = 10x - 6, find f(g(x)). -40x + 24 -40x + 31 -40x + 64 -40x + 70

• This Question is Closed
1. snowskimwake

Do you know how to start it?

2. thebroski

no

3. snowskimwake

Alright g is on the inside, so you are going to put the function g, into the x of the function f

4. thebroski

ok

5. snowskimwake

Does that make sense? Are you able to do it now?

6. thebroski

i dont even know what im looking at

7. snowskimwake

haha alright here, -4(10x-6) + 7 I put g(x) into f(x) now just solve

8. snowskimwake

simplify not solve

9. thebroski

how do i do that?

10. Jasmineflvs

first analyze it the question is find f(g(x)) you already know that f(x) = -4x + 7 and g(x) = 10x - 6...but in the question there is no f(x) but there is just an f so what would you do to find f

11. snowskimwake

simplify? just distribute the parenthesis

12. Jasmineflvs

no not yet

13. snowskimwake

yes you would, from what I said he would

14. snowskimwake

I already went through putting the function g into the function f

15. Jasmineflvs

you would take away the x from the equation so it would be f=-4+7

16. Jasmineflvs

i think

17. thebroski

;__; what do i do

18. snowskimwake

no you would not

19. snowskimwake

listen to me, you have f(x) = -4(10x-6) + 7

20. Jasmineflvs

i'm sorry i'll try to find a link that can help you..kk..first what kind of problem is this

21. thebroski

algebra

22. snowskimwake

then you just simplify f(x) = -4(10x-6) + 7 -40x + 24 + 7

23. Jasmineflvs

i mean like equation....ect.

24. snowskimwake

f(x) = -40x + 31, and that is your answer

25. snowskimwake

so b

26. Jasmineflvs

lets have two opinions first kk

27. snowskimwake

No it is b I promise you

28. thebroski

im going to cry

29. snowskimwake

jasmineflvs I came up with one of the answers, you told him to eliminate the x which you DO NOT DO. I promise you it is b, I can show you again if you like

30. Jasmineflvs

no lets get two opinions and dont cry

31. snowskimwake

Why does he need two opinions? alright thebroski I want you to work it out yourself, start by putting g(x) into the x in f(x)

32. snowskimwake

f(x) = -4x + 7 and g(x) = 10x - 6, so g(x) goes into f(x = -4(g(x) goes here) + 7

33. Jasmineflvs

just a sec kkk i'll get it and if you were rigght ill give you a medal..kk

34. thebroski

thats racists

35. Jasmineflvs

???

36. Jasmineflvs

how?? may i ask

37. thebroski

.just a sec ((kkk))) i'll get it and if you were rigght ill give you a medal..kk

38. Jasmineflvs

??? still dont understand why it is racist

39. thebroski

Let f(x) = 2x + 2. Solve f-1(x) when x = 4. 1 3 4 10

40. Jasmineflvs

let me guess you got the answer

41. thebroski

no im just terrible at math

42. snowskimwake

f^-1(x) is an inverse equation

43. Jasmineflvs

that's okay

44. snowskimwake

you need to switch the spots of x and y in the equation given and the solve for y, make sense

45. snowskimwake

?

46. Jasmineflvs

sorry i can't help you on functions i am behind in Algebra...I'm in 10th grade and I'm still in Algebra 1...sorwie

47. thebroski

im in 10th to but math is not my subject i dont understand any of it except 2+2 thats all i understand

48. Jasmineflvs

lolz

49. Jasmineflvs

i'm getting a friend to help you on this one

50. Jasmineflvs

@sasogeek @Hero @jim_thompson5910 @cwrw238 plz help him

51. UsArmy3947

ok got the answer

52. UsArmy3947

here f(10x-6)=31-40x

53. thebroski

wut

54. UsArmy3947

thats the answer

55. thebroski

oh right

56. UsArmy3947

sorry sir if u want help be more nicer

57. thebroski

what do you mean

58. thebroski

.Let f(x) = 2x + 2. Solve f-1(x) when x = 4. 1 3 4 10

59. sasogeek

thebroski, if you're not going to put some effort into understanding the concept of the answer, no one can really help you. stop posting questions with multiple choice answers if you're not ready to learn

60. UsArmy3947

dont say any thing without thinking this is a Moderator

61. thebroski

i am trying to put effort into this its just that i have a problem with understanding things im just kinda slow.

62. thebroski

btw i really dont care if ur the moderator it doesnt give you the right to ban someone because they need help with questions

63. sasogeek

i'm not going to ban u for asking for help, in fact i'll help you if i can. it just doesnt seem like u really want the help though. sounds like u just want the answer cos it's quite a long thread and u still don't get it... reposting the question with the possible answers doesn't get u so far on this site. be patient, and try at least, to understand :)

64. thebroski

ok

65. UsArmy3947

ya i could also help u

66. thebroski

Tango Hotel Alpha November Kilo Yankee Oscar Uniform

67. UsArmy3947

what?

68. thebroski

it means thank you

69. UsArmy3947

no problem ill be leaving now bye

#### Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy