What's 5*8+8/1+(9(5*5))

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?

Which graph depicts the path of a projectile

Pls never taught i’m really confused and i rlly need