Math- Check my answers please!

1. x^9 over x^2
A)x^11
B)x^7***
C)7
D)x^5

2. h^14 over h^5
A)h^-9
B)1 over h9
C)h^19
D)h^9***

3.4^4 over 4 ^6
A)-16
B)16***
C)1 over 16
D)-1 over 16

4.5^0
A)0
B)5
C)1***
D)-5

5.7^4 over 7^2_____ 49
A)<***
B)>
C)=
D)none of the above

6.–2r(8r + 5)
A)–16r2 + 5
B)–16r2 + 10***
C)–16r2 – 10r
D)–16r2 – 10

7.4a(a^2 + 7a + 4)
A) 4a+28a^2+16a***
B)4a^3+ 28a^2+ 16a
C)4a^3 + 44a
D)44a^4

8.(2y-3)(3y-2)
A)6y2 – 13y + 6
B) 6y2 – 13y – 6
C)6y2 + 13y – 6
D)6y2 + 13y + 6***
Can you please check my answers?!?!
Thanks :)

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  1. #3
    4^4/4^6 = 1/4^2 = 1/16

    #5
    7^4/7^2 = 7^2 = 49

    #6
    –2r(8r + 5)
    = -16r^2 - 10r

    #7
    4a(a^2 + 7a + 4)
    = 4a^3 + 28a^2 + 16a

    #8
    (2y-3)(3y-2)
    = 6y^2 - 4y - 9y + 6
    = 6y^2 - 13y + 6

    Looks like somebody has some major review ahead of them.

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    posted by Reiny
  2. Sorry but I answered your question first but it looks like "Reiny" had deleted it
    How rude!

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    posted by rignald
  3. I deleted your post because all you gave were answers.

    Answers without explanation are just about worthless to a struggling student.

  4. post it again

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  5. nevermind:

    1.B
    2.D
    3.C
    4.C
    5.C
    6.C
    7.B
    8.A

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  6. thanks!!

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  7. Fraxus is correct got 100%

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  8. thx so much

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    posted by hello
  9. FraxusFairyTailShipper is correct

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