How do you find the perimeter of a box?

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

Which of the following will form the composite function?

The graph shows how many words per minute two students read. drag to the table the unit rate that matches each graph.