Which of the following sets is closed under division?

Two different linear functions are shown below with two points given from each function. use slope-intercept form or point-slope form to find the equation of each. linear function a points: (–5, –2), (–5, 7) linear function b points: (7, –5), (–2, –5) function a has: the equation of line a is: function b has: the equation of line b is:

1. are the triangles similar and if so why? what is the value of x? show your work.

Find the solution of this system of equation -7x+y=-20 9x-3y=36