Answer:
You could use a graphing calculator I just used Desmos. Origin is (0, 0). Rotate 90 degrees about the origin. 
I used triangles
The rotated point would be at (1, 2)
ANSWER: the question mark = 1
 
        
             
        
        
        
Answer:
11.8
Step-by-step explanation:
I think it is subtracting fractions. 
First you turn the fractions into decimals then subtract it. After, you turn the decimal to a fraction but i am having a hard time doing that... the decimals by the way is 12.5 and 0.7 according to converters
 
        
                    
             
        
        
        
Answer:
The answer is ✰ 4 ✰
Step-by-step explanation:
:))