Cho tam giác ABC cân tại A. Trên cạnh BC lấy điểm D và E sao cho BD=DE=EC. Gọi M là trung điểm của DE. a. CMR AM vuông góc với BC
b. so sánh các độ dài AB, AD, AE, AC

In two or more complete sentences describe how to determine the appropriate model for the set of data, (1,1), (3,2), (6,3), (11,4).

How many grams the dog will eat in 3 days?

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?