<h3>
Answer:   x = 6</h3>
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Work Shown:


Those are the possible solutions, but plugging x = -14 back into the original equation will lead to an error. So we rule x = -14 out
x = 6 works as a solution however
 
        
        
        
Answer:
A
Step-by-step explanation:
Refer to the picture above. 
Explainations are written in the pic above. 
 
        
             
        
        
        
Answer:The simplified expression that represents the uncle's age is 
4y + 12
Step-by-step explanation:
Let y represent your age.
Your sister is 3 years older than you. This means that your sister's age is y + 3
Your uncle is 4 times older than your sister. It means that the age of your uncle would be 
4(y + 3)
The simplified expression that represents your uncle's age would be 
4y + 12
 
        
             
        
        
        
I think it’s C. Sorry if I’m incorrect
        
                    
             
        
        
        
A triangle that has an angle that measures 90 degrees would be a Right Triangle.