Math! Please Help!

1. What is the simplified form of (–3x^3y^2)(5xy^–1)?

I think it is 15x^4y

2. What is the simplified form of –9m^–2n^5 × 2m^–3n^–6?

I have no idea on this one. :/

3. A rectangular pasture has a fence around the perimeter. The length of the fence is 16x^7 and the width is 48x^4. What is the area of the pasture?

Agian IDK

4. What is the simplified form of (3.25 × 10^3)(7.8 × 10^6) written in scientific notation?

2.535 x 10^10 maybe?

5. The size of a certain cell is 2.5 × 10^–9 m. Another cell is 1.5 × 10^3 times larger. How large is the larger cell in scientific notation?

I think 4 x 10^-27

BTW, Please tell me the right anwsers on the ones i missed. I have tried to do this. Thanks!

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  1. Do you guys need the choices?

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    posted by Electro
  2. Please help me =(

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    posted by Electro
  3. :(

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    posted by Electro
  4. #1
    -15x^4y

    #2
    –9m^–2n^5 × 2m^–3n^–6?
    = -18m^-5 n^-1
    or
    -18/(m^5n)

    #3 area = length x width
    = (16x^7)(48x^4)
    = 768 x^11

    #4 correct

    #5
    2.5 × 10^–9 x 1.5 × 10^3
    = 3.75 x 10^-6

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    posted by Reiny
  5. I don't see any math tutors online right now. You need to have patience ... and NEVER post anything that is "urgent" or "right now"!! Tutors here are volunteers, and they check in whenever they have time.

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  6. Ahhh, Reiny came in. Excellent!

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  7. okay thanks for tips and thanks for helping!

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    posted by Electro
  8. simplify 3-5n/9(1-n)*27n+1

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    posted by buhari
  9. Reiny got it right

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    posted by Anon
  10. 1. C
    2. B
    3. C
    4. A
    5. D

    100% correct. Thanks for helping me double check my answers.

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  11. Anonymous GACA is 100% right

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    posted by Private
  12. GACA is riight. just took the quiz

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    posted by EYYYYY
  13. Thank you!!

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    posted by Jinxx
  14. That is wrong

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  15. GACA Is 100000000% right thank you so much !!!! I have D in math this will help thank you ! This was just to check my answers btw

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  16. Thanks GACA!!!

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    posted by Happy
  17. same here GACA 100% for Multiplying Powers With the Same Base QC.

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  18. B
    C
    A
    D
    C

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    posted by Olivia
  19. Olivia, is that for conexxus

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  20. @Olivia those answers are wrong, to everyone else the answers by GACA are correct.

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  21. thanks homie^

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  22. Ring ding dong ring a ding ding ding dong

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  23. c
    b
    c
    a
    d
    connections lesson 3 unit 3

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  24. Thank you Gaca, you grade saver <3<3

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  25. GACA is correct. 5/5 100%

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    posted by Kelly
  26. i have 6 questions tho

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    posted by Student
  27. If you have 6 it’s o
    C-15x^4y
    B- -18/m^5n
    C- 768x^11
    A-2.535 x 10^10
    D- 3.75 x 10^-6m
    B- 1.62 x 10^9

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  28. Number 6 for connexus studens isn't B, Its C

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    posted by Almost
  29. Yeah I got a 6/7 with I don't know's answers.
    The asnwers for me were
    C
    B
    C
    A
    D
    C

    Hope this helps

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    posted by Katy
  30. 5/6*

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    posted by Katy
  31. Anonymous GACA is correct...don't use anyone else's answers...

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    posted by Jordi

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