Answer:
27.8 Celsius
Step-by-step explanation:
The equation to convert Fahrenheit and Celsius is:
F = (9/5)C + 32
82 = (9/5)C + 32 -- subtract 32 from both sides
50 = (9/5)C -- multiply both sides by 5
250 = 9C -- divide by 9
27.777 = C
round up to 27.8 C
 
        
             
        
        
        
F = 1.8C + 32
С = -10   ⇒   F = 1.8·(-10) + 32 = 14   ⇒   
(-10, 14)С = 0      ⇒   F = 1.8·(0) + 32 = 32      ⇒   
(0, 32)
С = 10    ⇒   F = 1.8·(10) + 32 = 50    ⇒   
(10, 50)С = 20    ⇒   F = 1.8·(20) + 32 = 68    ⇒   
(20, 68)
 
        
        
        
Three days
1 1/4 = 5/4 
1/2= 2/4
2/4+1/4= 3/4 the first day
5/4-3/4= 2/4 
2/4 = 1/4 and 1/4 = two days
the first day+ two days= 3 days
        
             
        
        
        
For an investment compounded continuously, the rule of 69 gives a better approximation than the rule of 72 (for normal compound interests).
        
                    
             
        
        
        

Step-by-step explanation:
Let's pick two points on the line:  and
 and  Let's calculate the slope of this line using these points:
 Let's calculate the slope of this line using these points:

With this value of the slope, we can write the general slope-intercept form of the equation as

To solve for the y-intercept b, let's use either P1 or P2. I'm going to use P2:

Therefore, the slope-intercept form of the equation is 
