Can you use the law of cosines in the triangle below? why or why not?

What are the relative frequencies to the nearest hundredth of the columns of the two-way table?

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?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10