Question

Can someone explain to me this answer
I’ll give u 10-25 points

Answer 1

`\boxed{\textrm{(A) Associative property}}.`

Explanation:

While it may look like the associative property was correctly demonstrated, it was not. Generally, this property says that for
`a,b,c\in\mathbb{R}` we have:

`(a+b)+c=a+(b+c).`

Let
`a = 7`,
`b = -x` and
`c=-5`. We then have:

`(7-x)-5 = [7+(-x)]+(-5) = (a+b)+c.`

Applying the associative property, we get:

`(a+b)+c = a+(b+c) = 7 + [-x + (-5)] = 7 - x - 5 = 7-(x+5).`

We now notice that the sign inside the parenthesis is wrong, so the answer is:

`\boxed{\textrm{(A) Associative property}}.`