Find each value base off the questions given

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?

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.

To determine the number of deer in a forest a forest ranger tags 280 and releases them back