What is the gcf of the numerator denominator of the rational expression below 5x-20/x2-2x-8

Which expression is equivalent to 2x^2+7x+4?

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?

Is there an x intercept in the equation 60*1.15^x