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Select the two expressions that are equivalent. (2 points)

-7у-3х
• -3х + 7у
7y- 320
-7у +3x

1 answer

To find the two equivalent expressions, let's analyze the options provided:

  1. -7y - 3x
  2. -3x + 7y
  3. 7y - 320
  4. -7y + 3x

Now, let's consider the relationships between these expressions:

  • The first expression, -7y - 3x, can be rearranged as -3x - 7y, which is equivalent to the second expression -3x + 7y when combined with the opposite sign of each term. However, they are not equivalent because they have different signs for the coefficients of yc
  • The third expression, 7y - 320, does not relate to the others as it contains different terms.
  • The fourth expression, -7y + 3x, is equivalent to the first expression when you combine signs: -7y - 3x = -(-3x + 7y) which transforms to match their terms correctly.

Thus, the two equivalent expressions are:

  • -7y - 3x
  • -7y + 3x

Answer: -7у - 3х and -7у + 3x.