Is 8.2 equivalent to 8.20?

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

Triangle knm is what is true about the sides of knm

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.