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candeebabee

  • 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?

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  1. ChmE
    • 2 years ago
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    was that equation given to you. it seems wrong.

  2. candeebabee
    • 2 years ago
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    Thats what the question said

  3. ChmE
    • 2 years ago
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    where did 72 come from? The people between 30 and 40 would be .80 times the total.

  4. candeebabee
    • 2 years ago
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    i have no idea..

  5. candeebabee
    • 2 years ago
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    i just need help

  6. ChmE
    • 2 years ago
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    ok. Let's solve the equation for x. So we are solving for the total of people who joined.

  7. candeebabee
    • 2 years ago
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    okay, i am so confused haha

  8. ChmE
    • 2 years ago
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    x = 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 30-40

  9. candeebabee
    • 2 years ago
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    thank you so much!(;

  10. ChmE
    • 2 years ago
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    yw

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