Please answer this question ASAP

Consider the function f(x)=-5x+3 what is f(-2)

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?

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.