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anonymous

  • one year ago

JHGJHGMNH NH H

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  1. anonymous
    • one year ago
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    i think it's D b.c range is y and 9 is Y and it's a positive 9 so it should be 9 in more? someone should check me.. please

  2. anonymous
    • one year ago
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    @jim_thompson5910

  3. anonymous
    • one year ago
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    @freckles

  4. freckles
    • one year ago
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    f(time)=a function of (number of video games) anyways the input time represents the domain and f(time) aka number of video games represents the range you said the domain was non-negative values values like 0,1,2,3,4,... and so on... but if f(x) = 6x + 9 then f(0)=6(0)+9=9 and f(1)=6+9=15 and so on... so yes the outputs are 9 or more

  5. anonymous
    • one year ago
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    yaaaaaaaaay ! thank you :)

  6. freckles
    • one year ago
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    and also non-negative values can include decimal numbers but f(0)=9 and f(1/2)=6(1/2)+9=3+9=12 and f(1)=15 so anyways just trying to show it the number values are increasing starting at 9

  7. freckles
    • one year ago
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    replace f(x) with 3 and solve for x

  8. freckles
    • one year ago
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    \[f(x)=\frac{4x+1}{3} \\ f^{-1}(3)=x \text{ implies } f(x)=3 \\ \text{ so replace } f(x) \text{ with } 3 \\ 3=\frac{4x+1}{3} \\ \text{ Solve for } x \]

  9. anonymous
    • one year ago
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    is it 2

  10. freckles
    • one year ago
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    yes 3(3)=4x+1 9=4x+1 8=4x x=2 so f(2)=3 which means \[f^{-1}(3)=2\]

  11. anonymous
    • one year ago
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    alright the first question was wrong. i got a 77% on this test which is better the an D or F but thank you

  12. freckles
    • one year ago
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    you are saying the question you asked before the inverse question"?

  13. freckles
    • one year ago
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    all the options had time being non-negative f(x)=6x+9 would definitely have range y greater than or equal to 9

  14. anonymous
    • one year ago
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    i guess C was it then

  15. anonymous
    • one year ago
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    but its ok... i passed

  16. freckles
    • one year ago
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    |dw:1437704714373:dw| yep for domain x greater than or equal to 0 we definitely have range is y greater than or equal to 9 that is a visual way to look at it a algebraic way is to do the following: we are given: \[x \ge 0 \\ \text{ multiply both sides by } 6 \\ 6x \ge 0 \\ \text{ add both sides by } 9 \\ 6x+9 \ge 9 \\ f(x)=6x+9 \\ \text{ so } f(x) \ge 9 \]

  17. freckles
    • one year ago
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    So if they didn't have the option where the range was y greater than or equal to 9 where the domain was nonnegative real numbers then they are actually wrong

  18. anonymous
    • one year ago
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    you might be right,, but its okhay lol i passed the test with an C thank youuu

  19. freckles
    • one year ago
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    oh I didn't know I was helping with a test.

  20. anonymous
    • one year ago
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    yeah, but thank you

  21. UsukiDoll
    • one year ago
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    Please don't post real exam/test questions as it is against terms and conditions and openstudy has an anti-cheating policy in effect. "By using the OpenStudy Site or Service, you acknowledge that OpenStudy cooperates fully with schools, colleges and other educational institutions (together “Schools”) and reserves the right to disclose User information to a School if there is an allegation by that School of cheating or violation of the School’s academic policies. Openstudy.com will take swift action against anyone found misusing the community’s Site or Service. In addition to refunding any membership fee, we will ban Users who cheat from the Site and Service permanently." More information can be found here: http://openstudy.com/terms-and-conditions

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