Write a linear equation in slope intercept form with a slope of -1 and a y intercept of 4

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?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²