The second one is bigger as the square is a even number with the negative whole
        
             
        
        
        
Because we know the midpoint is in the middle, we know that both sides are equal. 
So set both = to each other
 4x - 1 = 3x + 3
add 1 to both sides
4x=3x+4
then subtract 3x from both sides and because there is always a 1 in front of x the answer would be
x=4
        
                    
             
        
        
        
Answer:
c
Step-by-step explanation:
2 are congruent
a is wrong because it says obtuse triangle b is wrong because again it say obtuse c is right and d is wrong because 2 angles are congruent
 
        
             
        
        
        
Answer:
10.5
Step-by-step explanation:
b=15/tan(55 degrees)=10.5
AC=10.5