For the additive inverse you have to flip the sign of the whole problem so 10(x^2 – 7x) becomes –10(x^2 – 7x). For the multiplicative inverse you take the whole problem and put it under 1 in a fraction.
She is not correct because “value of expressions” mean the result which for this it is 16-13 =3 and she is wrong. please mark me brainly! Hope this helps! :D