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anonymous

  • one year ago

If 8p = -2X2 - 100, which of the following could X possibly be?

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  1. misty1212
    • one year ago
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    HI!!

  2. misty1212
    • one year ago
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    is it \[8p=-2x^2-100\]?

  3. anonymous
    • one year ago
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    Yes mam!

  4. misty1212
    • one year ago
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    so i guess your job is to solve for \(x\) right?

  5. anonymous
    • one year ago
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    Thanks for the help @misty1212 greatly appreciate it. And yes find X

  6. misty1212
    • one year ago
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    maybe start with \[8p+100=-2x^2\] then divide by \(-2\) and get \[-4p-50=x^2\]

  7. misty1212
    • one year ago
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    last step would be to take the square root and get \[x=\pm\sqrt{-4p-50}\]

  8. anonymous
    • one year ago
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    That's not a answer choice :9 This is so confusing.

  9. misty1212
    • one year ago
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    can you post a screen shot?

  10. misty1212
    • one year ago
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    or give the choices?

  11. anonymous
    • one year ago
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    x = -8p - 100 over 2

  12. anonymous
    • one year ago
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    How did you get that!?

  13. misty1212
    • one year ago
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    it it wrong we need a screen shot or sommat

  14. anonymous
    • one year ago
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    http://gyazo.com/0238f2b09b590917c2e11614eaf83973

  15. misty1212
    • one year ago
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    lol the idiots did not bother to divide by 2!!!

  16. misty1212
    • one year ago
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    go with C

  17. anonymous
    • one year ago
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    Thanks!!! Few more?

  18. misty1212
    • one year ago
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    sure i hope they get better

  19. anonymous
    • one year ago
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    Solve 3x2 + x + 10 = 0. Round solutions to the nearest hundredth. I got no real solutions but idk.

  20. misty1212
    • one year ago
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    no real solution looks good

  21. anonymous
    • one year ago
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    shes right

  22. anonymous
    • one year ago
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    Thanks @LesTwins

  23. anonymous
    • one year ago
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    Derek kicks a soccer ball off the ground and in the air, with an initial velocity of 31 feet per second. Using the formula H(t) = -16t2 + vt + s, what is the maximum height the soccer ball reaches?

  24. misty1212
    • one year ago
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    is it really 31, or could it be 32?

  25. anonymous
    • one year ago
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    idk -_- @satellite73

  26. misty1212
    • one year ago
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    i am asking if you made a typo is all it would be tons easier if it was "initial velocity of 32" instead of "31"

  27. anonymous
    • one year ago
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    31

  28. misty1212
    • one year ago
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    ok then if it is 31 it is 31 first coordinate of the vertex of \(y=ax^2+bx+c\) is \(-\frac{b}{2a}\) which, in your case, is \[-\frac{31}{2\times( -16)}=\frac{31}{32}\]

  29. misty1212
    • one year ago
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    if it was initial velocity of 32 you would get a 1, which would be a lot easier to deal with, but whatever now you have to compute \[h(\frac{31}{32})\]

  30. misty1212
    • one year ago
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    i would use a calculator http://www.wolframalpha.com/input/?i=-16%2831%2F32%29%5E2%2B31%2831%2F32%29

  31. anonymous
    • one year ago
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    at max height H(t)=0 -32t+v=0 t=v/32 t=31/32 H(31/32)=-16(31/32)^2+31*31/32 = 15

  32. anonymous
    • one year ago
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    tahnks <3

  33. anonymous
    • one year ago
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    Last one A toy rocket was launched from the ground. The function f(x) = -16x2 + 128x shows the height of the rocket f(x), in feet, from the ground at time x seconds. What is the axis of symmetry of the graph of f(x), and what does it represent?

  34. anonymous
    • one year ago
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    @satellite73 pls

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