I would recommend calculatorsoup.com for the fractions part.
        
             
        
        
        
A is the answer to your question
        
             
        
        
        
Answer:
120 deg
Step-by-step explanation:
Draw a horizontal line that passes vertices of 2 angles 125 deg and 115 deg.
This line is perpendicular with 2 vectors.
Apply the property of vertical angles and the sum of 3 angles in a triangle.
x = 180 - (125 - 90) - (115 - 90) = 120 deg
 
        
             
        
        
        
Answer:
I think C
Step-by-step explanation:
 
        
                    
             
        
        
        
The square root of 2.25 is 1.5