Trên mặt phẳng tọa độ cho ba điểm A(2;3)B(-1;-3)C(0;-1) a)tìm hệ số gocs của đường thẳng AB
b)Chứng tỏ rằng ba điểm A, B,C thẳng hàng

Why do interests rates on loans to be lower in a weak economy than in a strong one

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need