Simplify the expression. 4 x (32 / (6 + 2)] - 9

Me because some of question i don’t understand

Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars

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?