What is f(5) the table that represents a function

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

Find the area of the regular hexagon if a side is 20 cm.

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length