Could someone please explain how to find these angle measures? Thanks so much to whoever can answer :)

What is the difference between the number of adult dogs at the park on monday and tuesday

James wants to promote his band on the internet. site a offers website hosting for $4.95 per month with a $49.95 startup fee. site b offers website hosting for $9.95 per month with no startup fee. for how many months would james need to keep the website for site a to be a better choice than site b?

Solve the system of equations. y=3x-1 and y=-2x+9. show work