Alright guys answer this fast what is the variable in this algebraic expression?

6n + 3

Find the solution set of this inequality. select the correct graph. |8x+16|> 16

Which math sentence can be used to determine if the triangle is a right triangle?

Arestaurant charges $100 to rent its banquet room for an event. it also charges $15 to serve dinner to each guest. write an equation for the total cost of the banquet room in terms of the number of guests. deine your variables. what is the total cost of the banquet room for 20 guests?