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iwanttogotostanford

  • one year ago

PRACTICE ACT Q: What expression must the center cell of the table below contain so that the sum of each row, each column, and each diagonal are equivalent?(DIAGRAM DRAWN BELOW)

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  1. iwanttogotostanford
    • one year ago
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    |dw:1444183648198:dw|

  2. iwanttogotostanford
    • one year ago
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    @zepdrix @Nnesha @Musicdude

  3. zepdrix
    • one year ago
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    How much does each column or row add up to? Have you tried calculating one of them yet? :)

  4. zepdrix
    • one year ago
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    Like just try the top row maybe, \(\large\rm x+8x-3x\)

  5. iwanttogotostanford
    • one year ago
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    no haha

  6. iwanttogotostanford
    • one year ago
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    I will try

  7. iwanttogotostanford
    • one year ago
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    yes i tried that now

  8. zepdrix
    • one year ago
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    and...?

  9. iwanttogotostanford
    • one year ago
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    well I see a pattern

  10. iwanttogotostanford
    • one year ago
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    it is 2x?

  11. zepdrix
    • one year ago
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    Yes, the missing amount is a 2x. I'm not what pattern you're talking about though.. hmm

  12. texaschic101
    • one year ago
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    everything adds up to 6x....with the 2x in the middle

  13. iwanttogotostanford
    • one year ago
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    but when I add up the first row accrues, I get 5x^2

  14. zepdrix
    • one year ago
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    That's what I was hoping you would figure out on your own, that the add up to 6x, but oh well...

  15. texaschic101
    • one year ago
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    oops....sorry

  16. iwanttogotostanford
    • one year ago
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    but I added up the first across and it doesn't equal 6x...?

  17. zepdrix
    • one year ago
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    \[\large\rm apple+apple\ne apple^2\]Not sure where the square came from, hmm :d

  18. zepdrix
    • one year ago
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    \[\large\rm apple+apple = two~apples\]

  19. iwanttogotostanford
    • one year ago
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    but don't two x equal x^2???

  20. texaschic101
    • one year ago
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    not when adding, just when multiplying

  21. zepdrix
    • one year ago
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    \(\large\rm x+x\ne x^2\) no :(

  22. iwanttogotostanford
    • one year ago
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    oh oak forgot that rule

  23. texaschic101
    • one year ago
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    x + x = 2x x * x = x^2

  24. zepdrix
    • one year ago
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    you have `an apple`, `8 more apples`, then `take away 3 apples`.

  25. iwanttogotostanford
    • one year ago
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    but if everything is supposed to equal to 6x then why doesn't the first row equal that??? They are all supposed to be equal

  26. zepdrix
    • one year ago
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    how many apples?

  27. texaschic101
    • one year ago
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    they do equal 6x

  28. iwanttogotostanford
    • one year ago
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    x+8x-3x doesn't equal 6?

  29. zepdrix
    • one year ago
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    bruh...

  30. zepdrix
    • one year ago
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    lol

  31. texaschic101
    • one year ago
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    1 + 8 - 3 = ?

  32. iwanttogotostanford
    • one year ago
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    ok OK haha i got it

  33. iwanttogotostanford
    • one year ago
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    i forgot that X counted as a 1

  34. iwanttogotostanford
    • one year ago
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    .....

  35. zepdrix
    • one year ago
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    oh :o

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