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anonymous

  • one year ago

Need help with 2 more

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  1. anonymous
    • one year ago
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  2. iGreen
    • one year ago
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    Okay, do the parenthesis first.

  3. anonymous
    • one year ago
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    -0.9

  4. iGreen
    • one year ago
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    Correct, that gives us: \(\sf -4.5[2x - 0.9]\) Now distribute -4.5 into the parenthesis..do you know how?

  5. anonymous
    • one year ago
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    No lol :D

  6. iGreen
    • one year ago
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    I just made another mistake..lol. It would actually give us: \(\sf -4.5[2x - (-0.9)]\) Or \(\sf -4.5[2x + 0.9]\)

  7. iGreen
    • one year ago
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    Okay, when we distribute, we take the number outside of the parenthesis and multiply it to everything inside the parenthesis.

  8. iGreen
    • one year ago
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    So \(\sf -4.5[2x + 0.9]\) becomes \(\sf (-4.5 \cdot 2x) + (-4.5 \cdot 0.9)\) Can you simplify that?

  9. anonymous
    • one year ago
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    yes on second

  10. iGreen
    • one year ago
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    |dw:1433332473826:dw|

  11. anonymous
    • one year ago
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    -13.05

  12. anonymous
    • one year ago
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    that's what i got

  13. iGreen
    • one year ago
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    It's \(\sf 2x\), not \(\sf 2\).

  14. iGreen
    • one year ago
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    Multiply to a variable is the same as multiplying with numbers. \(\sf 3 \times 4x = 12x\) \(\sf 3 \times 4 = 12\) And we just add the 'x' next to it..so what's \(\sf -4.5 \cdot 2x\)?

  15. anonymous
    • one year ago
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    -9x

  16. anonymous
    • one year ago
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    @iGreen

  17. iGreen
    • one year ago
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    Correct! So we have: \(\sf -9x + (-4.5 \times 0.9)\)

  18. iGreen
    • one year ago
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    Multiply inside the parenthesis.

  19. anonymous
    • one year ago
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    -4.05

  20. anonymous
    • one year ago
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    now i have to do this -9 + -4.05

  21. anonymous
    • one year ago
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    but my calculator is not working

  22. iGreen
    • one year ago
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    Yes, we have: \(\sf -9x - 4.05\) That's our answer..we can't combine them since they're not like terms.

  23. anonymous
    • one year ago
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    so C omg thank you i need help with one more

  24. iGreen
    • one year ago
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    Yep, just close this and open a new one.

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