Evaluate n^2 - 6 if n = 7 please help me

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0

Aculinary club earns $1360 from a dinner service. they sold 45 adult meals and 80 student meals. an adult meal costs twice as much as a student meal. what is the cost of an adult meal?

Are you guys willing to me with these last 8 questions on my homework for math reply to this question that i posted