AREA OF A TRIANGLE: TRIANGLE IS SIDEWAYS, 15 M ON THE LONG SIDE OF THE TRIANGLE AND 2M IN THE MIDDLE WHATS THE AREA!? PLEASE AND THANK YOU! <3

Use set builder notation to represent the following set: { -3, -2, -1, 0}

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 perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.