Multiplicity of a root means, is there that many times.
 
 
        
        
        
5% fail
so 100-5=95% are left
percent means parts out of 100
95% of 100 is 

 times 100=95
95 students are left assuming that the 5% that fail fail within 12 months
 
        
        
        
X=5 
90°-50°=40°
5x+15=40°
5x=25°
x=5
        
             
        
        
        
Answer:
A. isosceles but not equilateral
Step-by-step explanation:
as we can see with the congruency markings, two sides are equal whereas one is different. this is the definition of isosceles