She is correct, first of all, to add 7/8 and 5/6; you must have common denominators so make 7/8 into 42/48 and make 5/6 into 40/48. Then just add them together now, and it will be 82/48. This when you divide 82/48 it will be 1 17/24. So, your answer is, yes, Kit is right.
The Last on = 45x^2 - 2x - 8
Reason being is because you would group and multiple:
(9x - 4) • (5x +2)
30 .....................................
Answer:
4x^3 + 36x^2 + 72x + 36x + 108
4x^3 + 36x^2 + 108x + 108
I really hope this helps you! <3
