Show that (-1,-1), (9,4), (20,6), and (10,1) are the vertices of a rhombus, and then find the area of this rhombus ( I know how to do the first part I just don't know how to find the area)

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?

Use this graph to find the cost of 6 show tickets

Solve for n. round to the tenths place, if necessary. 14.2 cups of flour6 loaves of bread= 20 cups of flour n