For each of the following find f(1)

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?

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table