Explain how to find the slope from a graph because i’m still confused

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

Name these type of angles shown check all that applies

The triangles are similar. what is the value of x? show your work.