Please help!! Which one should I use to solve this problem!

What is the value of x in the diagram below?

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?

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?