Answer:
C
Step-by-step explanation:
 
        
                    
             
        
        
        
The length of the side of the small triangle is 4...the side length of the large triangle is 9 (5+4), not 5. It should be correctly written as 4/6 = 9/x
        
             
        
        
        
Answer:
14.25/25
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
- September
Step-by-step explanation:
The temperature in Beijing, in m months after January, is given by the following equation:

In which m is the number of months after January.
During which month in the year would the temperature reach 55°F? 
We have to find m for which: T(m) = 55. So




Now, we apply the inverse cosine, on both sides of the equation, to find the value of m.

Now, with the help of a calculator, in radians:





8.27 months after January, since 8.27 + 1 = 9.28, it happens during the month of September.
 
        
             
        
        
        
Answer: 3
Step-by-step explanation: