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anonymous

  • one year ago

help will give medal Evaluate the following expression using the values given: Find x3 − 2y2 − 3x3 + z4 if x = 3, y = 5, and z = −3. (1 point) −185 −77 −23 85 I get - 26 but it not an answer

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  1. NathaliaMA13
    • one year ago
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    if x = 3, y = 5, z = -3 The expression would be shown as (3)3 - 2(5)\[(3)^{3} - 2(5)^{2} - 3(3)^{3} + -3^{4}\]2

  2. NathaliaMA13
    • one year ago
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    please ignore the half-way expressions on the top and bottom. lol

  3. anonymous
    • one year ago
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    ok lol and I got that far but I don't know what to do from there cause I obviously did something wrong lol

  4. NathaliaMA13
    • one year ago
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    OK Let's work through this together. :-) What is \[3^{2}\] ??

  5. NathaliaMA13
    • one year ago
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    i mean 3 to the 3rd power omg

  6. anonymous
    • one year ago
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    9 lol bout to say that

  7. NathaliaMA13
    • one year ago
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    now what is 2 x 5 to the 2 power?

  8. anonymous
    • one year ago
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    100 ??

  9. NathaliaMA13
    • one year ago
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    oh gosh. noooo

  10. NathaliaMA13
    • one year ago
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    it's 50

  11. NathaliaMA13
    • one year ago
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    I'll just simply give you the answer, it's -23

  12. NathaliaMA13
    • one year ago
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    Try it on your computer's calculator. it will give you so much help lol

  13. anonymous
    • one year ago
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    im so stupid :( lol

  14. NathaliaMA13
    • one year ago
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    NO, don't ever say that. You just haven't gotten the hang of what your lesson's teaching you about. I can explain on how I did it . if youd like me to. ? (:

  15. anonymous
    • one year ago
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    ya sure maybe ill see where I messed up again lol

  16. NathaliaMA13
    • one year ago
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    ight ight (: so you know how the question tells you what number the variables mean? like x = 3, y = 5, z = -3 well, all you gotta do next time, is rewrite it on a piece of paper and basically substitute the variables to the numbers that the question listed. and if there's any powers, you multiply, and if there's any in parenthesis, you include that number in with what you're multiplying. is this making sense ? @shadow2239

  17. anonymous
    • one year ago
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    so if it was 2 (5) ^2 I would add 2 +5 and do 6^2 ????

  18. NathaliaMA13
    • one year ago
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    No, shadow. You would multiply, 2(5) means to multiply because they're close together and there's really nothing there to prove that you have to add. and well...since 2 x 5 equals 10, you multiply 10 twice.

  19. NathaliaMA13
    • one year ago
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    because it has a power of 2.

  20. anonymous
    • one year ago
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    so it would be 20 then ?

  21. NathaliaMA13
    • one year ago
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    no no \[10^{2}\] does not mean 10 x 2 it means, 10 x 10. you're multiplying 10 TWICE not by two. :c

  22. anonymous
    • one year ago
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    then it would be 100

  23. NathaliaMA13
    • one year ago
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    Yes.

  24. anonymous
    • one year ago
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    can you tell me if this is right -3(2)^2-(-1)^3+3(3)^2-2(-1)^3 I simplified and got 48 is that right ????

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