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M_M13

  • one year ago

will medal what is the best way to classify each question? A) Identity B) Contradiction C) Neither

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  1. M_M13
    • one year ago
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    1. 5X - 20 = 2(3X - 10) 2. 4X - 16 - 2X = 2(X-8)

  2. M_M13
    • one year ago
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    3. 6X - 15 = 3(2x - 6) 4. 5X -3(X -4) = 2(X - 6)

  3. anonymous
    • one year ago
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    Do you know what identits and contradictions are in mathematic terms?

  4. kweenlexis
    • one year ago
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    0.0 lets see

  5. M_M13
    • one year ago
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    help?

  6. anonymous
    • one year ago
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    An identity is when the equation is true, such as 3 = 1 + 2. A contradiction is when the equation is not true, such as 3 = 4 x 1. If you simplify the equations given, you should be able to solve whether or not they are identities or contradictions

  7. M_M13
    • one year ago
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    @kweenlexis help?

  8. M_M13
    • one year ago
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    help simplify

  9. anonymous
    • one year ago
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    1. 5X - 20 = 2(3X - 10) If we simplify the second half, we will be able to solve the problem. The only step we need to do with this one is distribute, so we just multiply that which is in the parenthesis by the number outside, in this case 2. 1. 5x - 20 = 6x - 20 is the simplified version for the first problem

  10. M_M13
    • one year ago
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    ok...

  11. anonymous
    • one year ago
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    As we can see, 5x - 20 does not equal 6x - 20, so that would be a contradiction

  12. M_M13
    • one year ago
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    ok

  13. anonymous
    • one year ago
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    2. 4X - 16 - 2X = 2(X-8) 4x and -2x are like terms, so we can combine them together to create 2x. 2. 2x - 16 = 2(x - 8) when we use the distributive property, we can simplify the second half to 2. 2x - 16 = 2x - 16 So is this an identity or a contradiction

  14. kweenlexis
    • one year ago
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    oh my bad i was doing some thing :(

  15. M_M13
    • one year ago
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    its ok

  16. M_M13
    • one year ago
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    so 2. is a contradiction

  17. M_M13
    • one year ago
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    cause the sides are the same yet they're opposite

  18. M_M13
    • one year ago
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    wait is 2. identity

  19. anonymous
    • one year ago
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    Yes, 2. is an identity. Are you starting to get the hang of it?

  20. M_M13
    • one year ago
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    ya, I just saw the question wrong

  21. M_M13
    • one year ago
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    can you help me with the others?

  22. anonymous
    • one year ago
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    sure

  23. M_M13
    • one year ago
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    thanks i'll give you a medal after

  24. M_M13
    • one year ago
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    hi

  25. M_M13
    • one year ago
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    hello?

  26. anonymous
    • one year ago
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    3. 6X - 15 = 3(2x - 6) this is just a one step distributive, so the second half will be 6x - 15 = 6x - 18 Identity or contradiction? 4. 5X -3(X -4) = 2(X - 6) This one is more complicated, as there are parentheses on both sides. We just need to tackle them one at a time. The first half will come out as 5x - 3x - 12, and then we can combine the like terms (5x and 3x) so that the first half will be 2x - 12 The second half is just distribution, so 2x - 12. The equation ends up simplifying to 2x - 12 = 2x - 12 Identity or contradiction? Hope I helped!

  27. M_M13
    • one year ago
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    3. is Identity

  28. M_M13
    • one year ago
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    sorry I meant for 4

  29. M_M13
    • one year ago
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    4. is identity and 3. is...

  30. M_M13
    • one year ago
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    3. is contradiction or neither?

  31. anonymous
    • one year ago
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    3. is a contradiction. Good job!

  32. M_M13
    • one year ago
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    thank you

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