abitolea05
abitolea05 abitolea05
  • 14-07-2017
  • Mathematics
contestada

Which expression is equivalent to 27 + 45? 8(3 + 6) 8(19 + 37) 9(3 + 5) 9(18 + 36)

Respuesta :

danielcbailey danielcbailey
  • 14-07-2017
9(3+5) is equivalent because factoring a 9 out of both 27 and 45 leaves us with 9(3+5).
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altavistard
altavistard altavistard
  • 15-07-2017
It may be easier to just do the work until you find a result equal to 27+45.
You must do the work inside parentheses first:

8(3+6) = 8(9) = 72  It just happens that this is equal to 72.

8(19+37) = 8(56)    This is much greater than 72 and is not the correct answer.

And so on.
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