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twitch

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  • one year ago
  • one year ago

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  1. twitch
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    \[\frac{ -4+20x }{ 4 }\] Simplify ?

    • one year ago
  2. ZeHanz
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    Divide both -4 and 20x by 4

    • one year ago
  3. twitch
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    but 4 doesnt goin to -4

    • one year ago
  4. ZeHanz
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    It does: suppose you want to check a division, e.g. 18/3=6. Then you know 18 = 6*3. Now -4/4 = ???, then 4 * ???= -4. What number is ???

    • one year ago
  5. twitch
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    1

    • one year ago
  6. ZeHanz
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    No, because 4*1=4 and not -4

    • one year ago
  7. twitch
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    -1

    • one year ago
  8. ZeHanz
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    OK, so -4/4 = -1 Now you have to do: 20x/4

    • one year ago
  9. twitch
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    5

    • one year ago
  10. ZeHanz
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    You lost x

    • one year ago
  11. twitch
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    5x

    • one year ago
  12. ZeHanz
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    Done!

    • one year ago
  13. twitch
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    so thats my final answer are my final equation

    • one year ago
  14. ZeHanz
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    You have -4 and 5x, so the final answer is... -4+5x

    • one year ago
  15. twitch
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    how bout this one \[-\frac{ 1 }{ 2 }(4-6a)\]

    • one year ago
  16. ZeHanz
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    Use the distributive property: a(b-c)=ab-ac

    • one year ago
  17. twitch
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    I dont knoe the distributie Prop

    • one year ago
  18. ZeHanz
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    It tells you how to get rid of the brackets! So you have to multiply -1/2 with 4 and also multiply -1/2 with -6a

    • one year ago
  19. twitch
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    okay I see

    • one year ago
  20. ZeHanz
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    What do you get?

    • one year ago
  21. twitch
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    how do I multiply a fraction in to a number

    • one year ago
  22. ZeHanz
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    Just forget the "-" for a while. 1/2 * 4 means you have four halves. How many is that?

    • one year ago
  23. twitch
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    2 wholes

    • one year ago
  24. ZeHanz
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    OK. Now remember that if you multiply a negative number with a positive number, the outcome is negative. So: -1/2 * 4 = ...

    • one year ago
  25. twitch
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    -2

    • one year ago
  26. ZeHanz
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    Right!, now the other one...

    • one year ago
  27. twitch
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    so for the other half it be-3 the i would be left with(-2- -3) and my answer be -5

    • one year ago
  28. ZeHanz
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    You have to multiply, so -1/2 * -6a = ...

    • one year ago
  29. twitch
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    6 isn't negative that was the subtraction sign

    • one year ago
  30. ZeHanz
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    OK, so save it for later. So: -1/2 * 6a = ...

    • one year ago
  31. twitch
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    -3

    • one year ago
  32. ZeHanz
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    You lost the a

    • one year ago
  33. twitch
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    -3a ugh srry:p

    • one year ago
  34. twitch
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    so then my equation would be(-2 - -3a)

    • one year ago
  35. twitch
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    the my answer should be -5a right

    • one year ago
  36. ZeHanz
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    No, -2 hasn't got an a with it, so you can't add it to 3a

    • one year ago
  37. ZeHanz
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    So it would be -2+3a

    • one year ago
  38. ZeHanz
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    -- = +

    • one year ago
  39. twitch
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    so it be 1a right

    • one year ago
  40. ZeHanz
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    No, it would be -2+3a. This cannot be written shorter! If it was -2a+3a this would be 1a or a.

    • one year ago
  41. twitch
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    oh okay got it

    • one year ago
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