Which of the following functions is graphed below?

What are the sotions to the quadratic equation 9x^2=4

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

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?