What is the cost of 6 composition books at 90 cents each? at c cents each?

Abe is a triangle. can you use the sss postulate or the sas postulate to prove triangle abc = triangle aed? by sss only neither apply both apply by sas only

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?

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?