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anonymous

  • one year ago

A Daredevil Jumps Off A Tall Building. He Falls Freely For Several Seconds Before Releasing His Parachute . His Height (h) In Meters , T Seconds After Jumping Can Be Modeled By : h=-4.9t^2+t+360 before he releases his parachute and h=-4t+142 After He Releases His Parachute . How Long After Jumping Did He Release His Parachute ? HELPP ME PLEASE !!!! @imqwerty

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  1. anonymous
    • one year ago
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    The height functions will be equal when he releases the parachute \[-4.9t^2+t+360=-4t+142\] Make one side equal to 0 and use the quadratic equation to solve

  2. Plasmataco
    • one year ago
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    He falls for218 meter

  3. anonymous
    • one year ago
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    How ?

  4. Plasmataco
    • one year ago
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    Are u asking me?

  5. anonymous
    • one year ago
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    im asking whoever can help me solve thus problem

  6. anonymous
    • one year ago
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    Do you know the quadratic equation?

  7. anonymous
    • one year ago
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    No But I Know How To Do The Formula

  8. anonymous
    • one year ago
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    sry, I meant formula

  9. anonymous
    • one year ago
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    The equation is in my first post

  10. anonymous
    • one year ago
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    Oh Yea i Had That

  11. anonymous
    • one year ago
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    what do you have?

  12. anonymous
    • one year ago
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    -4.9t^2 + t +360 = 4t +142

  13. anonymous
    • one year ago
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    Thats All I Have I Dont Know The Next Step.

  14. anonymous
    • one year ago
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    It should be -4t + 142 on the right side. the next step is to make one side be 0 by adding or subtracting everything on that side of the equation. You have -4t on the right side. How would you move it from the right to the left?

  15. anonymous
    • one year ago
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    Can You Please Explain

  16. anonymous
    • one year ago
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    By Drawing So I Can Get A Visual Picture .

  17. anonymous
    • one year ago
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    Is one of these what you want? Not really sure what you're asking for?|dw:1439936124822:dw| |dw:1439936251767:dw|

  18. anonymous
    • one year ago
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    So Where It Says Add Or Subtract ?

  19. anonymous
    • one year ago
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    ill subtract the 4t

  20. anonymous
    • one year ago
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    You want to add the 4t because it's actually -4t (at least it is in the original problem statement). Whatever the sign is, do the opposite

  21. anonymous
    • one year ago
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    Ok Can You Draw It Out ?

  22. anonymous
    • one year ago
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    |dw:1439936950147:dw|

  23. anonymous
    • one year ago
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    Right Right There It Is

  24. anonymous
    • one year ago
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    AND Now I Do The Formula .

  25. anonymous
    • one year ago
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    Correct ?

  26. anonymous
    • one year ago
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    yeah, what did you get as the equation though? I left the addition/subtraction for you to do

  27. anonymous
    • one year ago
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    -4.9t^2 + 364 -142=0

  28. anonymous
    • one year ago
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    I aligned the terms so you can actually add straight down. What's\[t+4t=\] and \[360-142=\]

  29. anonymous
    • one year ago
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    4t^2 and 218

  30. anonymous
    • one year ago
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    t + 4t = 5t (add the coefficients, never change the exponents when adding or subtracting). So this is the equation |dw:1439937754826:dw|

  31. anonymous
    • one year ago
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    I Plugged Them In.

  32. anonymous
    • one year ago
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    ok. what did you get for t?

  33. anonymous
    • one year ago
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    x=-6 x2=7

  34. anonymous
    • one year ago
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    yeah, closer to -6.2 and 7.2?

  35. anonymous
    • one year ago
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    Yeah

  36. anonymous
    • one year ago
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    Do You Mind Helping Me Again Ill Tag You If So

  37. anonymous
    • one year ago
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    yeah

  38. anonymous
    • one year ago
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    Ok

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