Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

julliemyers

Check my answers?

  • one year ago
  • one year ago

  • This Question is Closed
  1. julliemyers
    Best Response
    You've already chosen the best response.
    Medals 1

    23. Solve the equation. Check for extraneous solutions. 9|9 – 8x| = 2x + 3 9l9-8xl=2x+3 subract 8 9l9l=-6x+3 subratc 3 9l6l=-6x 54=-6x -9.33333333

    • one year ago
  2. julliemyers
    Best Response
    You've already chosen the best response.
    Medals 1

    13. What are the real or imaginary solutions of the polynomial equation? 27x^3 + 125 = 0 27x^3+125=0 27x^3=–125x^3=–125/27x^3=(–5/3)^3x=–5/3

    • one year ago
  3. precal
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1357254686057:dw|

    • one year ago
  4. julliemyers
    Best Response
    You've already chosen the best response.
    Medals 1

    18. Use Pascal’s Triangle to expand the binomial. ( d – 5)^6 =(d^4-10d+25d-10d+100d-250d+25d-250d+625)(d-10d+25)=(d^4-20d+150d-500d+625)(d-10d+25)=d^6-10d^5+25d^4-20d^5+200d^4-500d+150d^4-1500d+3750d-500d+5000d-12500d+625d-6250d+15625=d^6-30d^5+375d^4-2500d+9375d-18750d+15625 21. Explain how to find the degree of a polynomial. To find the degree of a polynomial its the same number term of highest degree. for an example, if u have terms 5 10 15 20, 20 would be the degree.

    • one year ago
  5. precal
    Best Response
    You've already chosen the best response.
    Medals 2

    your process is incorrect for the second one, you will need to take the cube root of the fraction

    • one year ago
  6. julliemyers
    Best Response
    You've already chosen the best response.
    Medals 1

    these are questions i missed on previous tests & id like to correct them

    • one year ago
  7. precal
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1357254904914:dw|ok still working on the same problem

    • one year ago
  8. precal
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1357254993499:dw|

    • one year ago
  9. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    \[27x^3 + 125 = 0\] factor the sum of two cubes as \[(3x+5)(3x^2-15x+25)\] first one gives you your answer, quadratic formula gives the answer for the two complex roots of \(3x^2-15x+25\)

    • one year ago
  10. precal
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1357255010162:dw|

    • one year ago
  11. tcarroll010
    Best Response
    You've already chosen the best response.
    Medals 1

    For your first problem (# 23), you will have 2 solutions because of the absolute value expression. Case #1: For x > 9/8 9(8x - 9) = 2x + 3 -> x = 1.2 Case #2: For x <= 9/8 9(9 - 8x) = 2x + 3 -> x = 39/37

    • one year ago
  12. zaynahf
    Best Response
    You've already chosen the best response.
    Medals 0

    For #13, did you use the \[(a +b) ( a^{2} + ab + b ^{2})\] method?

    • one year ago
  13. zaynahf
    Best Response
    You've already chosen the best response.
    Medals 0

    *correction (a+b) (a^2 - ab + b^2)

    • one year ago
  14. tcarroll010
    Best Response
    You've already chosen the best response.
    Medals 1

    @satellite73 please check your factoring

    • one year ago
  15. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    oh yeah, it is wrong isn't it?

    • one year ago
  16. satellite73
    Best Response
    You've already chosen the best response.
    Medals 1

    \[27x^3+125=(3x+5)(9x^2-15x+25)\] is more like it

    • one year ago
  17. tcarroll010
    Best Response
    You've already chosen the best response.
    Medals 1

    thx, @satellite73 you saved me a bunch of typing. Great approach, explanation, and theory. Just a typo, as we all do that from time-to-time.

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.