A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
solve 7.2x ― 65 = 0
anonymous
 5 years ago
solve 7.2x ― 65 = 0

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.07.2x=65 x=65/7.2=9.028

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Hmm the problem that i had with this question is that the x is in the powers position in teh question (Attached file) ...does it mean teh same thing?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sorry in question it doesn't look that like..

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ik thats why i posted pic

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[xln7.2=\ln65\] now please find the values

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[xln7.2=\ln65\] now please find the values

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0x = 2.11....? i just ln both #'s in cal...and divided the two to solve for x....ik its wrong but idk how to do this..

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0do u know the use of ln???

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0please go through the page http://en.wikipedia.org/wiki/Logarithm

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Your problem looms like this..\[7.2^{x} 65=0\] Hence \[7.2^{x}=56\] So take the log of both sides of the equation using your calculator (this will automatically be to base 10) \[\log_{10}7.2^{x} =\log_{10} 65\] Then because of the laws of logorithms you can bring the power down to become the coefficient of the first term \[x \log_{10} 7.2=\log_{10} 56\] Then divide the right by the left leaving x on the left hand side; \[x=\log_{10}56/\log_{10} 7.2\] which equals 2.1146(4.D.P) you can check it equals x by raising 7 to this number  it gives 65.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.