Write an equivalent fraction for 1/3+2/5 using 15 as the common denominator

F(x) = (x^2 + 3x − 4) and g (x) = (x+4) find f/g and state the domain.

How do you use the elimination method for this question? explain, because i really want to understand!

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?