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Algebra

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Help!!

13. Use the Distributive Property to simplify 7(6x^2 + 5x + 4)

15. Evaluate 5w^2 if w = .5

19. Write a simplified expression to represent 5 times the sum of x and 3 increased by 10.
Is it 10+5(x+3) ?

Thanks
-MC

  • Algebra -

    Also,

    15. Evaluate 5w^2 if w = .5
    Is the answer 6.25?

    -MC

  • Algebra -

    13. 7(6x^2 + 5x + 4)
    = 42x^2 + 35x + 28

    Many mathematicians would consider
    7(6x^2 + 5x + 4) to be more "simplified" than the expanded version.

    15. 5(.5)^2 = 5(.25) = 1.25

    19. yes

  • Algebra -

    I don't quite understand how you got that for #15..don't you have to take it to the second power?

    And-- 7(6x^2 + 5x + 4) to be more "simplified" than the expanded version..what is this for?

    Thanks
    -MC

  • Algebra -

    I did.

    5(.5)^2
    = 5(.5)(.5)
    = 5(.25)
    = 1.25

    For the other part, I simply commented that the original expression in factored form is considered to be more simplified than the expanded form. In other words, the question is poorly worded.
    I should have simply said, "Expand"

  • Algebra -

    Okay, thanks for your help!

    -MC

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