Please help me with 9

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

What is the difference between the equations of a vertical and a horizontal line?