A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 2 years ago
A social networking site recorded that 80% of the people who became members of the site one month were between 30 and 40 years old. The equation below represents this information, where x represents the total number of people who became members of the site that month.
x = 0.8x + 72
How many people who became members of the site that month were between 30 and 40 years of age?
 2 years ago
A social networking site recorded that 80% of the people who became members of the site one month were between 30 and 40 years old. The equation below represents this information, where x represents the total number of people who became members of the site that month. x = 0.8x + 72 How many people who became members of the site that month were between 30 and 40 years of age?

This Question is Closed

ChmE
 2 years ago
Best ResponseYou've already chosen the best response.0was that equation given to you. it seems wrong.

candeebabee
 2 years ago
Best ResponseYou've already chosen the best response.0Thats what the question said

ChmE
 2 years ago
Best ResponseYou've already chosen the best response.0where did 72 come from? The people between 30 and 40 would be .80 times the total.

ChmE
 2 years ago
Best ResponseYou've already chosen the best response.0ok. Let's solve the equation for x. So we are solving for the total of people who joined.

candeebabee
 2 years ago
Best ResponseYou've already chosen the best response.0okay, i am so confused haha

ChmE
 2 years ago
Best ResponseYou've already chosen the best response.0x = 0.8x + 72 x  .8x = .8x + 72  .8x .2x = 72 Divide both sides by .2 x = 360 Now that we know the total we can multiply this by 80% of .8 to get ppl between 3040

candeebabee
 2 years ago
Best ResponseYou've already chosen the best response.0thank you so much!(;
Ask your own question
Ask a QuestionFind 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.