Answer:
2
Step-by-step explanation:

 
        
             
        
        
        
Answer:
<h2>13</h2>
Step-by-step explanation:

 
        
             
        
        
        
3t+12-4t-6=-4
-t=-4+6-12
-t=-10
t=10
That's your answer.
        
                    
             
        
        
        
Answer:
ΔABC≅ΔDEC by AAS
Step-by-step explanation:
You can use the AAS method of congruency.
Since you already have <BAC and <EDC congruent to eachother, and sides BC and EC congruent to each other, you only need that one remaining angle in between. <ACB can be proven congruent to <DCE by the Vertical Angles Theorem, and that gives you the AAS you need to prove that these two triangles are congruent
Hope this helped.