Simplify each expression.
(6n + 4 – 6n?) – (6n" – 5n² + 7n3)

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

Plz i beg u asap ! what is the equation of this graphed line? enter your answer in slope-intercept form in the box.

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?