A quadrilateral has angles of q, 5q + 15 , 3q - 55, and 4q - 20. Find the largest angle of the quadrilateral, in degrees
One thing that you should know is that any quadrilateral's angles sum to 360. Thus, we can make the equation
(q) + (5q + 15) + (3q - 55) + (4q - 20) = 360
This is just simple algebra that you should be able to do. You can simplify this, and then once you find out what q is, figure out what the largest angle is.
BTW this question was also answered here: https://web2.0calc.com/questions/geometry_51921