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anonymous

  • one year ago

please help! Evaluate the following expression using the values given: Find 4x − y − 2z if x = −2, y = 3, and z = −2 −15< I thought it was this, but its not... 15 −7 7

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  1. MichaelAlex292
    • one year ago
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    Input the values in the equation:\[4(-2) - (3) - 2(-2)\] And then solve

  2. anonymous
    • one year ago
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    I did.. I solved it, and I thought I solved it correctly... I even wrote the problem like that!

  3. MichaelAlex292
    • one year ago
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    Hmmm, let's see:\[(-8 ) - 3 = -11\] \[-11 + 4 = -7\] Remember that -2 times -2 is +4, so -7 is the answer

  4. anonymous
    • one year ago
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    oh thanks!

  5. MichaelAlex292
    • one year ago
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    No problem

  6. anonymous
    • one year ago
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    can you help with another one?

  7. MichaelAlex292
    • one year ago
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    Ok, but let me see it first

  8. MichaelAlex292
    • one year ago
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    What class are you taking btw?

  9. anonymous
    • one year ago
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    Evaluate the following: −3 − (−8). 5 −5 −11< wouldnt it be this? −18

  10. anonymous
    • one year ago
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    algebra 1

  11. MichaelAlex292
    • one year ago
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    Oh ok, so for this equation, this is what it looks like:\[-3 + -1(-8)\] When you have a negative sign right before the parentheses, it can be shown like above. Now can you solve it?

  12. anonymous
    • one year ago
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    Think of it like this \[\large (-3)+(-1(-1 \times 8)\] The two -1's cancel out leaving you with \[\large -3+8\]

  13. MichaelAlex292
    • one year ago
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    Yep, he's right

  14. anonymous
    • one year ago
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    so 5?

  15. MichaelAlex292
    • one year ago
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    Yes

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