A community for students.
Here's the question you clicked on:
 0 viewing
Kuoministers
 3 years ago
Help me on this question please... I really dont know where to start thanks!!
Kuoministers
 3 years ago
Help me on this question please... I really dont know where to start thanks!!

This Question is Closed

Kuoministers
 3 years ago
Best ResponseYou've already chosen the best response.0\[\huge3^{x} + 5 \times 3^{x} = 54\]

DeadShot
 3 years ago
Best ResponseYou've already chosen the best response.0to start, we need to isolate the variables, we start by dividing both sides by 3^x, then subtract 5 from both sides, and then multiply both sides by 3^x \[3^x + 5 \times 3^x \div 3^x = 54 \div 3^x\] \[3^x + 5  5 = 54/3^x\]

DeadShot
 3 years ago
Best ResponseYou've already chosen the best response.0\[3^x \times 3^x = 54/3^x \times 3^x  5\]

DeadShot
 3 years ago
Best ResponseYou've already chosen the best response.0\[9^x^2 = 51\] so now we find the square root of each side

DeadShot
 3 years ago
Best ResponseYou've already chosen the best response.0\[\sqrt{9^x^2} = \sqrt{51}\]

DeadShot
 3 years ago
Best ResponseYou've already chosen the best response.0the square and square root cancel each other out, so it would be \[9^x \approx 7 \]

Kuoministers
 3 years ago
Best ResponseYou've already chosen the best response.0im not sure but thats not the answer that is in the back of the book :P

DeadShot
 3 years ago
Best ResponseYou've already chosen the best response.0divide both sides by 9 \[9^x \div 9 = 7 \div 9\] \[^x = 7/9\]

Kuoministers
 3 years ago
Best ResponseYou've already chosen the best response.0thats not the answer in the book :P

Kuoministers
 3 years ago
Best ResponseYou've already chosen the best response.0i think the way he started the question was wrong cause i was told to keep the same base

artix_17
 3 years ago
Best ResponseYou've already chosen the best response.1Yea, 3^x X 3^x can be written as 3^2x

Kuoministers
 3 years ago
Best ResponseYou've already chosen the best response.0yea i agree on that

Kuoministers
 3 years ago
Best ResponseYou've already chosen the best response.0\[\huge3^{2x} + 5 = 3^{3} \times 2\] this might help?

rizwan_uet
 3 years ago
Best ResponseYou've already chosen the best response.2dw:1359366605554:dw

Kuoministers
 3 years ago
Best ResponseYou've already chosen the best response.0i broke up 54 into 3^3 times 2 cause i wanted to make the base the same which in this case 3

rizwan_uet
 3 years ago
Best ResponseYou've already chosen the best response.2dw:1359366719099:dw

Kuoministers
 3 years ago
Best ResponseYou've already chosen the best response.0i didnt see you could factorise 3^x out of that equation!! Thanks so much to both of you :)

artix_17
 3 years ago
Best ResponseYou've already chosen the best response.1You can do the 3^x X 3^x = 3^2x

artix_17
 3 years ago
Best ResponseYou've already chosen the best response.1No, because its actually 3^x + ( 5 X 3^x )

artix_17
 3 years ago
Best ResponseYou've already chosen the best response.1You have to either solve inside the bracket first or factorize

Kuoministers
 3 years ago
Best ResponseYou've already chosen the best response.0oh thanks @artix_17 for pointing that out!! I wouldn't have noticed :P
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.