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

Really need on these. i have no idea what to do

If a =6, what is the value of 2a(3b + 5c)?

Which of the following statements is not true? a.parallel lines are lines in the same plane that never intersect. b.congruent figures have the same shape and same size angles and sides. c.similar figures must have the same shape and the same size. d.a rotation is when you turn a figure around a certain point.