Answer:
A mathematical model is a description of a system using mathematical concepts and language. The process of developing a mathematical model is termed mathematical modeling. Mathematical models are used in the natural sciences and engineering disciplines, as well as in non-physical systems such as the social sciences.
 
        
             
        
        
        
Hello! 
∠GCE = 14° (corresponding angles) 
∠GEC = 180° - 78° - 14° (sum of angles in a triangle) 
∠GEC = 88° 
4x + 88° = 180° 
4x = 180° - 88° 
4x = 92° 
x = 23°
        
             
        
        
        
your answer is A plz mark brainlies