Need with questions 17 to 19. show work step by step and theorems/extra info that justifies/supports the respective answers.

What is this inequality notation? t is less then or equal to 2

How do you determine if an ordered pair is a solution to a given equation?

Find the equation of a line that is perpendicular to line g that contains (p, q). coordinate plane with line g that passes through the points negative 3 comma 6 and 0 comma 5 3x − y = 3p − q 3x + y = q − 3p x − y = p − q x + y = q − p