i will give brainliest

What is the missing constant term in the perfect square that starts with x^2 -20x

What other information do you need to prove triangle dac=bca by asa

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?