Answer: 14
Step-by-step explanation:
1. Add the two negative sign together to make a plus:
-16 + 30
2. Do the math 
-16 + 30 = 14
 
        
                    
             
        
        
        
Answer:
34.3°
Step-by-step explanation:
The sum of supplementary angles = 180° , then
supplement = 180° - 145.7° = 34.3°
 
        
             
        
        
        
Answer:
The answer is 23
Step-by-step explanation:
x²- 3xy + 5y², for x = 3 and y = -1
(3)²- 3(3)(-1) + 5(-1)²
9 + 9 + 5 = 23
Thus, The answer is 23
 
<u>-TheUnknownScientist</u><u> 72</u>
 
        
                    
             
        
        
        
Answer:
8.4m
Step-by-step explanation:
11.2+3.4-6.2=8.4