melodycassandra melodycassandra
  • 05-02-2020
  • Mathematics
contestada

1. Is -7+9=-9+7 true, false, or open? (1 point)
O true
O false
open
Is Ay _ 3 = 19 true false or onen? noninti

Respuesta :

gabbykemp2023
gabbykemp2023 gabbykemp2023
  • 05-02-2020
1. Is false

It is false because -7+9 equal 2 and -9+7 equal -2
Answer Link
jimthompson5910 jimthompson5910
  • 05-02-2020

Problem 1

-7+9 is the same as 9+(-7) or 9-7. All of which simplify to 2.

On the other hand, -9+7 is the same as 7+(-9) or 7-9, which simplifies to -2.

Therefore the equation -7+9 = -9+7 becomes 2 = -2, and we can see this is a false equation.

Answer: false

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Problem 2

Your second question has some weird typo errors going on. Please update.

Answer Link

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