3. What are the coordinates of the points of tangency of the two tangent lines through the point (1,1) each tangent to the circl
e x^2+y^2=1?
       
      
                
     
    
    
    
    
    1 answer:
            
              
              
                
                
Answer: 
    
Step-by-step explanation:
Given
equation of circle 
Equation of tangent passing through (1,1)
Slope of tangent is given by differentiating equation of circle


at 

Equation of line with slope


 
    
 
                                
             
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Answer:
5.
Objective C

7

 
        
             
        
        
        
Answer:
1.5
# of postcards per day
and 9
 
        
             
        
        
        
Answer:
3/5
Step-by-step explanation:
m=3/5
slope---3/5
 
        
             
        
        
        
Fine increase = 78 - 65 = 13
Increase rate = 13/65 x 100% = 20%
Discounted amount = 560 - 476 = 84
Discount rate = 84 / 560 x 100% = 15%
        
             
        
        
        
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The answer is true because it comes before subtraction in the phrase PEMDAS.