What does 28x+84 equal

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

What expression is equivalent to log3(x+4)