It’s kinda urgent lol

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

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.