What is the perimeter of this triangle?

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

How many solutions does the nonlinear system of equations graphed below have?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?