anonymous
  • anonymous
Simplify the following expression. 7x - 4y + 5z - 2x - 10y + z A) 5x - 14y + 6z B) 9x - 14y + 6z C) 5x - 6y + 6z D) 9x - 6y + 6z
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
@MATTW20
anonymous
  • anonymous
just combine like terms. meaning combine all the ones that have the same letter
anonymous
  • anonymous
do you add to combine?

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anonymous
  • anonymous
yes but make sure you take the sign of each into account for example in this problem it's -4y+(-10y)
anonymous
  • anonymous
soooooooo 14?
anonymous
  • anonymous
well for that part it would be -14y can't forget about the sign or the y. but what about the rest
anonymous
  • anonymous
So B?
anonymous
  • anonymous
and how did you arrive at that answer?
anonymous
  • anonymous
I added the like terms together
anonymous
  • anonymous
but 7+(-2) doesn't equal 9 does it?
anonymous
  • anonymous
no it is 5
anonymous
  • anonymous
and therefore b doesn't make sense does it. So what would the correct answer be
anonymous
  • anonymous
A?
anonymous
  • anonymous
Well say it like you mean it don't question mark it :) A!!!! correct btw

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