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Nullify Group Title

Evaluate the following expression using the values given. Find 4x - y - 2z if x = -2, y = 3, and z = -2

  • 2 years ago
  • 2 years ago

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  1. dgo Group Title
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    what are you having trouble with?

    • 2 years ago
  2. dgo Group Title
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    you substitute the values given for the appropriate variable then follow PEMDAS

    • 2 years ago
  3. Nullify Group Title
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    Substitute what values?

    • 2 years ago
  4. dgo Group Title
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    x = -2, y = 3, and z = -2

    • 2 years ago
  5. dgo Group Title
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    the numbers are values

    • 2 years ago
  6. Nullify Group Title
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    Ohh okay 1 sec

    • 2 years ago
  7. Nullify Group Title
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    is it 9?

    • 2 years ago
  8. dgo Group Title
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    no, first just sub the values and rewrite the full expression with the x y z

    • 2 years ago
  9. dgo Group Title
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    i mean without the x y z

    • 2 years ago
  10. dgo Group Title
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    you can rewrite it here

    • 2 years ago
  11. dgo Group Title
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    do u understand what im asking?

    • 2 years ago
  12. Nullify Group Title
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    4(-2) - 3 - 2(-2)

    • 2 years ago
  13. dgo Group Title
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    exactly! now do you know how to solve that?

    • 2 years ago
  14. Nullify Group Title
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    I do the ones in parentheses first right?

    • 2 years ago
  15. dgo Group Title
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    well parentheses come first, but here what is inside the parentheses is just a number, there nothing to do in there. so you actually do multiplication first. 4(-2) is just another way, a more clear way, of saying 4 * -2

    • 2 years ago
  16. Nullify Group Title
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    I did that and I got 8 - 3 - -4

    • 2 years ago
  17. dgo Group Title
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    4 * -2 actually equals -8

    • 2 years ago
  18. Nullify Group Title
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    Ohhhhh whoops

    • 2 years ago
  19. dgo Group Title
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    whenever you multiply a negative and a positive the answer is always negative

    • 2 years ago
  20. Nullify Group Title
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    Oh so it';s -7?

    • 2 years ago
  21. dgo Group Title
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    boom! nice job

    • 2 years ago
  22. Nullify Group Title
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    Haha, thanks!

    • 2 years ago
  23. dgo Group Title
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    :) good luck

    • 2 years ago
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