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anonymous

  • one year ago

The balance in two separate bank accounts grows each month at different rates. The growth rates for both accounts are represented by the functions f(x) = 2x and g(x) = 4x + 12. In what month is the f(x) balance greater than the g(x) balance?

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  1. anonymous
    • one year ago
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    can u help me @Shirley27

  2. Shirley27
    • one year ago
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    Here, it would be an inequality of 2x > 4x +12

  3. anonymous
    • one year ago
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    so it would be 6

  4. Shirley27
    • one year ago
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    solving it would look something like this: 2x > 4x + 12 -2x > 12 x < -6 except that doesn't seem right...

  5. anonymous
    • one year ago
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    why

  6. Shirley27
    • one year ago
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    you can't have negative months

  7. anonymous
    • one year ago
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    these are the answers 0mnths 1mnths 2mnths 3mnths

  8. anonymous
    • one year ago
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    and true

  9. anonymous
    • one year ago
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    hello are u still there

  10. Shirley27
    • one year ago
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    hold on, i'm getting a graph

  11. anonymous
    • one year ago
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    oh

  12. Shirley27
    • one year ago
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  13. anonymous
    • one year ago
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    so it would be 2

  14. Shirley27
    • one year ago
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    the red is 2x and the blue is 4x + 12, the place where the red is above the blue is in the negative

  15. anonymous
    • one year ago
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    or 3

  16. Shirley27
    • one year ago
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    well, what does x represent? the month?

  17. anonymous
    • one year ago
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    correct

  18. Shirley27
    • one year ago
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    is y the growth rate or the actual amount?

  19. anonymous
    • one year ago
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    i think so?

  20. Shirley27
    • one year ago
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    If y was the growth rate and both accounts started at the same amount, then the answer should be 0?

  21. anonymous
    • one year ago
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    oh i get where ur coming from

  22. anonymous
    • one year ago
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    thank

  23. anonymous
    • one year ago
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    its not 0

  24. Shirley27
    • one year ago
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    oh, then i'm afraid I can't help you :(

  25. anonymous
    • one year ago
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    0h oh k

  26. anonymous
    • one year ago
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    maybe it is not \[f(x)=2x\] could it be \[f(x)=2^x\]?

  27. anonymous
    • one year ago
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    because for positive numbers \(2x\) is always less than \(4x+12\)

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