Question

Which of the following is the solution to the equation 25(z + 4) = 125?
z = 5.5
z = 3.5
z = −2.5
z = −0.5

Answer 1

The equation is 25^(z+4)=125

Answer 2

@naate

Answer 3

@welshfella
@ganeshie8

Answer 4

lemme give it a shot lol

Answer 5

take logs of both sides

Answer 6

and use the following rule of logs

log a^b = b log a

Answer 7

z is 1

Answer 8

How do I turn that into a log? :/

Answer 9

i found the answer, but its not on there, unless im trippin

Answer 10

And yeah, that's what I got but it's not an answer choice, your supposed to solve it using a logarithmic function but I SUCK at that @naate

Answer 11

log 25^(z + 4) = log 125

(z + 4) log 25 = log 125

Answer 12

ok lol i guess i do too @Kimberly_PR

Answer 13

now divide both sides by log 25

Answer 14

Ok...
So you would get (z+4) = 1.5
Am I right so far?

Answer 15

yes

Answer 16

now its easy

Answer 17

Now I just need to solve for z like a regular equation...
SO I got z= -2.5
Is that correct?

Answer 18

yea

Answer 19

Ok, thank you soooo much! @welshfella
And @naate thank you too for trying :) lol

Answer 20

yw

Answer 21

lol no prob anytime @Kimberly_PR

Answer 22

I gave @welshfella the medal for best response but I still fanned you so thanks again, lol I guess we both learned something new today @naate

Answer 23

thnx! @Kimberly_PR