Answer:
357 / 2 
Step-by-step explanation:
your answer would have been 178.5 but just a reminder always do whats in the exponets
 
        
             
        
        
        
Step-by-step explanation:
1. No: angles add to more than 180 deg.
2. Yes: each side's length is between the sum and difference of the lengths of the other two sides.
3. No: not every side's length is between the sum and difference of the lengths of the other two sides.
4. Yes: for example, place the 50 deg angle between the two given sides. Another side will then make the triangle.
5. Yes: for example, use 3 cm as the short leg in a 30-60-90 right triangle.
 
        
             
        
        
        
September : 12
october:  18
november : 16
together in sept. and oct. = 12+18 = 30
number of books he read more in sept. and oct. then just nov.= 30 - 16 = 14
in short, the answer is 14 books.
hope it helps you!
        
                    
             
        
        
        
Hey i just need points
U got this
        
             
        
        
        
Combine like terms
X=-4
Y=17