Mom, I'm scared he's watching me right now 0-0

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Which expression gives the area of the triangle shown below

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?