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anonymous

  • one year ago

4. Simplify the expression. -3(b – 7) This is what i got -3 -3b -21 +3 +3 -3 b -18 18/3 =6

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  1. AbdullahM
    • one year ago
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    Lets start from the beginning.

  2. AbdullahM
    • one year ago
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    We need to use this property, which by chance I had told you in the earlier post. \(\sf\Large a(b+c)=ab+ac\)

  3. AbdullahM
    • one year ago
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    HOWEVER, your question is \(\sf\Large -3(b-7)\)

  4. anonymous
    • one year ago
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    Yeah

  5. AbdullahM
    • one year ago
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    so since you have a problem with negative numbers, let me make it a little easier on you :)

  6. AbdullahM
    • one year ago
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    \(\sf\Large -a(b-c) = -ab + ac\) Remember to carefully look at the - and +'s :)

  7. anonymous
    • one year ago
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    Okay. Still don't really get it.

  8. AbdullahM
    • one year ago
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    just replace the a with 3 and the c with 7

  9. anonymous
    • one year ago
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    -3(7) = -21?

  10. anonymous
    • one year ago
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    -3(-7) 21

  11. anonymous
    • one year ago
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    Is this right?

  12. AbdullahM
    • one year ago
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    \(\sf\Large-3(b – 7)=\\\sf\Large (-3)(b) - (-3)(7)=? \)

  13. AbdullahM
    • one year ago
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    and that is correct :)

  14. anonymous
    • one year ago
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    So i do need to do anything else with this problem?

  15. AbdullahM
    • one year ago
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    but 21 isn't the final answer.

  16. AbdullahM
    • one year ago
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    so far you have gotten: \(\sf\Large (-3)(b) - (-3)(7)=-3b-(-21)\)

  17. anonymous
    • one year ago
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    Why is it saying i'm typing and half the time i'm not. XD

  18. anonymous
    • one year ago
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    So do i solve for b?

  19. AbdullahM
    • one year ago
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    that's an OpenStudy glitch xD

  20. AbdullahM
    • one year ago
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    and no, just simplify that what is - (-21) = ?

  21. anonymous
    • one year ago
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    Positive 21?

  22. AbdullahM
    • one year ago
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    correct

  23. AbdullahM
    • one year ago
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    so your final answer would become: \(\sf\Large -3b+21\)

  24. anonymous
    • one year ago
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    Alright thank you so much ^ ^

  25. AbdullahM
    • one year ago
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    :)

  26. anonymous
    • one year ago
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    Openstudy not letting me close the question

  27. AbdullahM
    • one year ago
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    refresh, maybe?

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