Question

Can someone walk me through this for a medal and a fan?
Solve ln(5x + 7) = 8. Round to the nearest thousandth.

Answer 1

brb

Answer 2

what is the inverse function of lnx?

Answer 3

lnx?

Answer 4

no the inverse of lnx is e^x

Answer 5

surry your making it to diffucult to understand an easier way to say this is do the oppsosite to both sides to get X alone.

Answer 6

Okay, I just need someone to point blank tell me what to do lol.

Answer 7

Sorry I am here to teach not to solve your problem.

Answer 8

well to start subtract the 8 and the 7

Answer 9

@mikaylabean, the reason @surry99 asked you what the inverse is is because your goal is to find some way to get rid of that natural log. The easiest and best way to do this is to know the inverse function for a logarithm. This is just exponentiate each side to the base of the log. For the natural log, this is e. Then this becomes an algebra problem you know and love. :)

Answer 10

then tell me what you get

Answer 11

okay. so in(5x-1)=1

Answer 12

nono noe

Answer 13

well sort of

Answer 14

not really

Answer 15

that is not correct at all. Please listen to @surry99

Answer 16

then yu have to divide

Answer 17

Guys, I'm dying here. I'm trying my best, alright?

Answer 18

What did I do wrong?

Answer 19

You are getting an incorrect method, listen to surry

Answer 20

"incorrect"

Answer 21

I wasn't asking for the problem handed to me... I'm askign for the steps... Are you guys serious? I'll do all the math.. ask anyone whom I've help or who has helped me before.. I was confused what was being asked of me...

Answer 22

ok so restart, and revamp.

Answer 23

Um.. yeah..

Answer 24

You are not able to do anything until you "undo" the ln. That is just how they work

Answer 25

Gotcha. How do I go about that?

Answer 26

so your first step is to apply the inverse of the natural log to both sides

Answer 27

So, I undo it. How do I do that?

Answer 28

what is the inverse of a log? I explain it above

Answer 29

You said it was "e"

Answer 30

yes, so what would \[e^{lnx}=?\]

Answer 31

Okay. I'm getting help from another source. This is all confusing, and I really didn't like being accused of that. Thank you so much @FibonacciChick666

Answer 32

use khanacademy.org to understand. It should be abundantly clear the way he explains these problems

Answer 33

but no matter what, you will need to know \(e^{lnx}=?\)

Answer 34

Okay. Thank you.

Answer 35

here is the actual link https://www.khanacademy.org/math/algebra2/logarithms-tutorial/logarithm_properties/v/introduction-to-logarithm-properties

Answer 36

np