# Math

ln(5x + 7) = 8

Not looking for an answer, I’m just stuck. Could someone give me the steps to solve this?

1. 👍 0
2. 👎 0
3. 👁 171
1. Remark:

e ^ ln ( a ) = a

So:

e^ ln ( 5 x + 7 ) = 5 x + 7
____________________

ln ( 5 x + 7 ) = 8

Cancel logarithms by taking expof both sides.

e^ ln ( 5 x + 7 ) = e ^ 8

5 x + 7 = e ^ 8

Subtract 7 to both sides

5 x + 7 - 7 = e ^ 8 - 7

5 x = e ^ 8 - 7

Divide both sides by 5

x = ( e ^ 8 - 7 ) / 5 = 1 / 5 ( e ^ 8 - 7 )

1. 👍 0
2. 👎 1
2. just ask ur teacher or math tutor

1. 👍 1
2. 👎 0

## Similar Questions

Calculate the position of the center of mass of the following pairs of objects. Use acoordinate system where the origin is at the center of the more massive object. Give youranswer not in meters but as a fraction of the radius as

asked by john on February 28, 2012
2. ### math

Which set of output values correctly completes the function table? input (x) output (y) -5 ? 12 ? 32 ? Give me step by step explanations and the answer. I'm so stuck. Please help

asked by hello on March 23, 2020
3. ### calc

Give the starting value a, the growth rate r, and the continuous growth rate k. Round the answer for r to two decimal places Q = 0.414(e^0.885)^t a = ? r = ?% k = ?% I found a to be 0.414 but when finding the percentage for r and

asked by lenny on October 3, 2014
4. ### Geology

1b - I have to draw a cross section showing the relationship with gabbro cutting across sandstone and schist with schist being the oldest. 1c - I have to write a brief geological history of the region starting with the oldest

asked by Desmond on April 29, 2007
5. ### Chemistry: gas law

I'm here at a study group with Aaron and while he's stuck on that question, I'm stuck on this one... I think we're gonna take a break but I'd love if someone could help break this down for me. Carbon monoxide, CO, and hydrogen, H

asked by sydney on October 23, 2015
1. ### trig

Given the radius of a wheel is 12inches and the angular speed is measured to be 3pie/4 radiant per second, find the linear speed of the piece of gum stuck to the where. Give both an exact answer. And a decimal answer rounded to 4

asked by ALISON on September 17, 2011
2. ### language art 8

Please help me, i really need to get this. the only question/essay im stuck on. Answer the following questions about the essay "Escaping." Give an example of one internal and one external conflict from the selection (5 points). I

asked by Lindsey on December 9, 2013
3. ### math

1. Select all the values of x that will make the following inequality true. 2(3x − 6) ≥ 5x − 10 Chat x = -5 x = 1 x = 0 x = 2 x = 13 x = 7 Please help I've been stuck on this problem for a long time at least just give me 1

asked by correction on September 20, 2016
4. ### Quantum Physics

Has anyone done Block 7-8 for TMA 6 for s103 - discovering Science, as i am struggling big time, any help would be much appreciated yes i am like you really phased by this how much of the tma have you managed to do Me, too what r