HURRY PLEASE I DONT WANT TO FAIL

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Which of the following expressions is equal to 2x^2+8

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.