iwanttogotostanford
  • iwanttogotostanford
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)
Mathematics
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iwanttogotostanford
  • iwanttogotostanford
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)
Mathematics
chestercat
  • chestercat
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iwanttogotostanford
  • iwanttogotostanford
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iwanttogotostanford
  • iwanttogotostanford
zepdrix
  • zepdrix
How much does each column or row add up to? Have you tried calculating one of them yet? :)

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zepdrix
  • zepdrix
Like just try the top row maybe, \(\large\rm x+8x-3x\)
iwanttogotostanford
  • iwanttogotostanford
no haha
iwanttogotostanford
  • iwanttogotostanford
I will try
iwanttogotostanford
  • iwanttogotostanford
yes i tried that now
zepdrix
  • zepdrix
and...?
iwanttogotostanford
  • iwanttogotostanford
well I see a pattern
iwanttogotostanford
  • iwanttogotostanford
it is 2x?
zepdrix
  • zepdrix
Yes, the missing amount is a 2x. I'm not what pattern you're talking about though.. hmm
texaschic101
  • texaschic101
everything adds up to 6x....with the 2x in the middle
iwanttogotostanford
  • iwanttogotostanford
but when I add up the first row accrues, I get 5x^2
zepdrix
  • zepdrix
That's what I was hoping you would figure out on your own, that the add up to 6x, but oh well...
texaschic101
  • texaschic101
oops....sorry
iwanttogotostanford
  • iwanttogotostanford
but I added up the first across and it doesn't equal 6x...?
zepdrix
  • zepdrix
\[\large\rm apple+apple\ne apple^2\]Not sure where the square came from, hmm :d
zepdrix
  • zepdrix
\[\large\rm apple+apple = two~apples\]
iwanttogotostanford
  • iwanttogotostanford
but don't two x equal x^2???
texaschic101
  • texaschic101
not when adding, just when multiplying
zepdrix
  • zepdrix
\(\large\rm x+x\ne x^2\) no :(
iwanttogotostanford
  • iwanttogotostanford
oh oak forgot that rule
texaschic101
  • texaschic101
x + x = 2x x * x = x^2
zepdrix
  • zepdrix
you have `an apple`, `8 more apples`, then `take away 3 apples`.
iwanttogotostanford
  • iwanttogotostanford
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
zepdrix
  • zepdrix
how many apples?
texaschic101
  • texaschic101
they do equal 6x
iwanttogotostanford
  • iwanttogotostanford
x+8x-3x doesn't equal 6?
zepdrix
  • zepdrix
bruh...
zepdrix
  • zepdrix
lol
texaschic101
  • texaschic101
1 + 8 - 3 = ?
iwanttogotostanford
  • iwanttogotostanford
ok OK haha i got it
iwanttogotostanford
  • iwanttogotostanford
i forgot that X counted as a 1
iwanttogotostanford
  • iwanttogotostanford
.....
zepdrix
  • zepdrix
oh :o

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