The correct answer is x= -1. Hope this helps!!
        
             
        
        
        
Short answer A
This one is exactly the same (with number changes) as the last one. You cannot use t which is in time, to mix with pure numbers which in this case is grams. That means that both C and D are incorrect.
Now as with the last one, are you going to raise e to a minus number or a plus number? Remember that if e is raised to a plus number, the sample in this case will increase. You are watching a radioactive decay. The number has to be smaller. So B is eliminated. There is only one answer left and that's A. It should be correct.
A <<<<< answer
        
             
        
        
        
Answer:
-21
Step-by-step explanation:
It would have to be -21 because there's -7, but the threes not negative so it would have to be -21
 
        
             
        
        
        
Use the sine law: sinB/b = sinA/a 
SinB = b*sinA/a 
sinB = 3*sin120° /8 
∠ B = 18.94° ≈ 19°
        
                    
             
        
        
        
Answer:
128
Step-by-step explanation:
180 - 52